Conditional Constructs in Java

In sequential flow of control, the statements of a program are executed from top to bottom in order in which they are written including method calls. During execution, the control is transferred to the method called. The method is then executed in a sequential order and upon its completion, the control is transferred back to the calling method and execution of statements continues sequentially. For example, the following program will be executed in a sequential manner:

public class SequentialExample {
    static void showGreeting() {
        System.out.println("Welcome to KnowledgeBoat");
    }

    public static void main(String args[]) {
        System.out.println("Sequential Execution Program Example");
        showGreeting();
    }
}

By default, the statements of a program are executed sequentially from top to bottom in order in which they are written. But most of the times our programs require to alter this top to bottom control flow based on some condition. When the flow of control of a program is changed based on some condition using control statements, it is termed conditional flow of control. For example, in the below program we achieve conditional flow of control using the if-else statement.

public class ConditionalExample {
    public static void main(String args[]) {
        int x = -10;
        if (x >= 0) {
            System.out.println("Positive Number");
        }
        else {
            System.out.println("Negative Number");
        }
    }
}

The break statement is used inside the switch statement to terminate a statement block. It brings the program control out of the switch statement.

break statement at the end of case is optional. Omitting break leads to program execution continuing into the next case and onwards till a break statement is encountered or end of switch is reached. This is termed as fall through. For example, consider the below program:

public class FallThroughExample {
    public static void main(String args[]) {
        int number = 1;
        switch(number) {
            case 0:
                System.out.println("Value of number is zero");
            case 1:
                System.out.println("Value of number is one");
            case 2:
                System.out.println("Value of number is two");
            default:
                System.out.println("Value of number is greater than two");
        }
        System.out.println("End of switch");
    }
}

Its output when executed will be:

Value of number is one
Value of number is two
Value of number is greater than two
End of switch

When none of the case values are equal to the expression of switch statement then default case is executed. In the example below, value of number is 4 so case 0, case 1 and case 2 are not equal to number. Hence println statement of default case will get executed printing "Value of number is greater than two" to the console.

int number = 4;
switch(number) {
    case 0:
        System.out.println("Value of number is zero");
        break;
    case 1:
        System.out.println("Value of number is one");
        break;
    case 2:
        System.out.println("Value of number is two");
        break;
    default:
        System.out.println("Value of number is greater than two");
        break;
}

Value of number is greater than two

The currently running program can be terminated with the help of the exit() method of the System class - System.exit(n). The argument n serves as a status code. A non-zero status code indicates abnormal termination, and a zero status code indicates a normal termination.

if (x == y)
    if (x == z)
        x = 1; 
    else 
        y = 1;
else
    z = 1;

ii. if (x == y) {if (y == z) x = 1; y = 2; } else z = 1;

if (x == y)
{
    if (y == z) 
        x = 1; 
    y = 2; 
} 
else 
    z = 1;

iii. if (num1 != num2) {
    if (num2 >= num3) x = 1; y = 2; }
    else {x = 1; if (num1 == num2) z = 3;}

if (num1 != num2)
{
    if (num2 >= num3)
        x = 1; 
    y = 2;
}
else
{
    x = 1;
    if (num1 == num2)
        z = 3; 
}

switch (choice) {
  case 1:
    System.out.println("You selected One");
    break;

  case 2:
    System.out.println("You selected Two");
    break;

  case 3:
    System.out.println("You selected Three");
    break;

  case 4:
    System.out.println("You selected Four");
    break;

  case 5:
    System.out.println("You selected Five");
    break;

  case 6:
    System.out.println("You selected Six");
    break;

  default:
    System.out.println("Invalid choice");
}

if (choice == 0 || choice == 1)
{
  x = 111;
  y = 222;
}
else
{
  if (choice == 2)
  {
    x = 333;
    y = 444;
  }
  else
  {
    if (choice == 3)
    {
      x = -11;
      y = -22;
    }
    else
    {
      y = 555;
    }
  }
}

if (a < Math.min(b, c))
  System.out.println(a);
else
  System.out.println(Math.min(b, c));

1. => is an invalid operator. it should be >=
2. Type of x should be String.

String x = (a >= b) ? "a" : "b";

1. Ternary operator is written incorrectly.
2. Type of x should be boolean.

int a=5, b=10;
boolean x = (a>b) ? true:false;

int max=215, min=323;
String str="";
if (max > min)
  str = "Max is greater than Min";
else
  str = "Min is Greater than Max";

n will be 4 after execution of the code.

First n = x + c is executed ⇒ n = 2 + (-1) = 1.
Next, n = n - c + x is executed.
    n = n - c + x
⇒ n = 1 - (-1) + 2
⇒ n = 4
So final value of n is 4.

Output is:
x=5 y=2

This code is swapping the values of x and y.

The code has the following errors:

1. char variable m is assigned a String literal.
2. S in Switch is capital.
3. There should be no semicolon (;) after switch statement.
4. Expression of switch statement is a String literal "A".
5. C in Case is capital.
6. Semicolon (;) of case statements should be replaced with colon (:).
7. D in Default is capital.

Corrected Version:

char m = 'A';
switch (m) {
  case 'a':
    System.out.println("A");
    break;
  case 'b':
    System.out.println("B");
    break;
  default:
    System.out.println("Not a valid option");
}

public class KboatDivisibleBy17
{
    public static void main(String args[]) {
        int sum = 0, count = 0;
        for (int i = 501; i < 1000; i++) {
            if (i % 17 == 0) {
                count++;
                sum += i;
            }    
        }
        System.out.println("Sum = " + sum);
        System.out.println("Count = " + count);
    }
}

import java.util.Scanner;

public class KboatNumber
{
    public static void main(String args[]) {
        Scanner in = new Scanner(System.in);
        System.out.print("Enter number: ");
        int n = in.nextInt();
        
        if (n >= 10 && n <= 99)
            System.out.println("Two Digit Number");
        else if (n >= 100 && n <= 999)
            System.out.println("Three Digit Number");
        else if (n >= 1000 && n <= 9999)
            System.out.println("Four Digit Number");
        else
            System.out.println("Please enter a 2, 3 or 4 digit number");
    }
}

import java.util.Scanner;

public class KboatWord
{
    public static void main(String args[]) {
        Scanner in = new Scanner(System.in);
        System.out.print("Enter a word: ");
        String w = in.nextLine();
        char ch = w.charAt(0);
        ch = Character.toUpperCase(ch); 
        if (ch == 'A' ||
            ch == 'E' ||
            ch == 'I' ||
            ch == 'O' ||
            ch == 'U')
            System.out.println("Word begins with a vowel");
        else
            System.out.println("Word does not begin with a vowel");
     }
}

import java.util.Scanner;

public class KboatDescending
{
    public static void main(String args[]) {
        Scanner in = new Scanner(System.in);
        System.out.print("Enter first number: ");
        int a = in.nextInt();
        System.out.print("Enter second number: ");
        int b = in.nextInt();
        System.out.print("Enter third number: ");
        int c = in.nextInt();

        int max = -1, mid = -1, min = -1;
        if (a > b) {
            if (a > c) {
                max = a;
                if (b > c) {
                    mid = b;
                    min = c;
                }
                else {
                    mid = c;
                    min = b;
                }
            }
            else {
                max = c;
                mid = a;
                min = b;
            }
        }
        else {
            if (b > c) {
                max = b;
                if (a > c) {
                    mid = a;
                    min = c;
                }
                else {
                    {
                        mid = c;
                        min = a;
                    }
                }
            }
            else {
                max = c;
                mid = b;
                min = a;
            }
        }
        
        System.out.println("Numbers in Descending order:");
        System.out.println(max + " " + mid + " " + min);
    }
}

import java.util.Scanner;

public class KboatLargestNumber
{
    public static void main(String args[]) {
        Scanner in = new Scanner(System.in);
        System.out.print("Enter first number: ");
        int a = in.nextInt();
        System.out.print("Enter second number: ");
        int b = in.nextInt();
        System.out.print("Enter third number: ");
        int c = in.nextInt();
        
        int max = a > b ? a : b;
        max = max > c ? max : c;
        
        System.out.print("Largest Number = " + max);
    }
}

import java.util.Scanner;

public class KboatMonthInWords
{
    public static void main(String args[]) {
        Scanner in = new Scanner(System.in);
        System.out.print("Enter month number: ");
        int n = in.nextInt();
        switch(n) {
            case 1:
            System.out.println("January");
            break;
            
            case 2:
            System.out.println("Feburary");
            break;
            
            case 3:
            System.out.println("March");
            break;
            
            case 4:
            System.out.println("April");
            break;
            
            case 5:
            System.out.println("May");
            break;
            
            case 6:
            System.out.println("June");
            break;
            
            case 7:
            System.out.println("July");
            break;
            
            case 8:
            System.out.println("August");
            break;
            
            case 9:
            System.out.println("September");
            break;
            
            case 10:
            System.out.println("October");
            break;
            
            case 11:
            System.out.println("November");
            break;
            
            case 12:
            System.out.println("December");
            break;
            
            default:
            System.out.println("Wrong month number");
            break;
        }
    }
}

import java.util.Scanner;

public class KboatAdmission
{
    public static void main(String args[]) {
        Scanner in = new Scanner(System.in);
        System.out.print("Enter marks in Physics: ");
        int p = in.nextInt();
        System.out.print("Enter marks in Chemistry: ");
        int c = in.nextInt();
        System.out.print("Enter marks in Mathematics: ");
        int m = in.nextInt();
        int t = p + c + m;
        int pm = p + m;
        
        if (p >= 70 && c >= 60 && m >= 70 
             && (t >= 225 || pm >= 150))
            System.out.println("Eligible");
        else
            System.out.println("Not Eligible");
    }
}

import java.util.Scanner;

public class KboatCityName
{
    public static void main(String args[]) {
        Scanner in = new Scanner(System.in);
        System.out.print("Enter your choice: ");
        char ch = in.next().charAt(0);
        switch (ch) {
            case 'D':
            System.out.println("Delhi");
            break;
            
            case 'M':
            System.out.println("Mumbai");
            break;
            
            case 'K':
            System.out.println("Kolkata");
            break;
            
            case 'C':
            System.out.println("Chennai");
            break;
            
            default:
            System.out.println("Invalid choice");
        }
    }
}

import java.util.Scanner;

public class KboatFunction
{
    public static void main(String args[]) {
        Scanner in = new Scanner(System.in);
        System.out.print("Enter x: ");
        int x = in.nextInt();
        int y = -1;
        if (x > 0)
            y = 7;
        else if (x == 0)
            y = 0;
        else
            y = -7;
            
        System.out.println("y=" + y);
    }
}

import java.util.Scanner;

public class KboatArkenstoneConsulting
{
    public static void main(String args[]) {
        Scanner in = new Scanner(System.in);
        System.out.print("Enter number of hours: ");
        int hrs = in.nextInt();
        System.out.print("Enter total sales: ");
        int sales = in.nextInt();
        double wage = hrs * 500;
        double c = 0;
        if (sales < 100)
            c = 0;
        else if (sales < 1000)
            c = 1;
        else if (sales < 10000)
            c = 2;
        else if (sales < 25000)
            c = 3;
        else
            c = 3.5;
           
        double comm = c * sales / 100.0;
        wage += comm;
        
        System.out.println("Wage = " + wage);
    }
}

import java.util.Scanner;

public class KboatTriangle
{
    public static void main(String args[]) {
        Scanner in = new Scanner(System.in);
        System.out.print("Enter first side: ");
        double a = in.nextDouble();
        System.out.print("Enter second side: ");
        double b = in.nextDouble();
        System.out.print("Enter third side: ");
        double c = in.nextDouble();
        
        double perimeter = a + b + c;
        double s = perimeter / 2;
        double area = Math.sqrt(s * (s - a) * (s - b) * (s - c));
        
        System.out.println("Perimeter = " + perimeter);
        System.out.println("Area = " + area);
    }
}

import java.util.Scanner;

public class KboatMayurTpt
{
    public static void main(String args[]) {
        Scanner in = new Scanner(System.in);
        System.out.print("Enter parcel weight: ");
        double wt = in.nextDouble();
        double amt = 0;
        
        if (wt <= 10)
            amt = 30 * wt;
        else if (wt <= 30)
            amt = 300 + ((wt - 10) * 20);
        else
            amt = 300 + 400 + ((wt - 30) * 15);
            
        System.out.println("Parcel Charge = " + amt);
    }
}

import java.io.BufferedReader; 
import java.io.IOException; 
import java.io.InputStreamReader; 

public class KboatDuckNumber
{
    public void duckNumberCheck() throws IOException {
        
        InputStreamReader reader = new InputStreamReader(System.in);
        BufferedReader in = new BufferedReader(reader);
        System.out.print("Enter number: ");
        boolean isDuck = false;
        boolean firstZero = false;
        int c = 0, d; 
        
        /*
         * 10 is the ASCII code of newline
         * We will read from inputstream
         * one character at a time till we
         * encounter a newline i.e. enter
         */
        while((d = in.read()) != 10) {
            
            char ch = (char)d;
            
            if (c == 0 && ch == '0'  ) 
                firstZero = true;
            
            if (!firstZero && ch == '0')
                isDuck = true;
                
            c++;
        }
        
        if (isDuck)
            System.out.println("Duck Number");
        else
            System.out.println("Not a Duck Number");
    }
}

import java.util.Scanner;

public class KboatElectricBill
{
    public static void main(String args[]) {
        Scanner in = new Scanner(System.in);
        System.out.print("Enter Units Consumed: ");
        int units = in.nextInt();
        double amt = 0.0;
        if (units <= 100)
            amt = units * 0.8;
        else if (units <= 300)
            amt = (100 * 0.8) + ((units - 100) * 1);
        else
            amt = (100 * 0.8) + (200 * 1.0) + ((units - 300) * 2.5);
            
        amt += 500;
            
        System.out.println("Units Consumed: " + units);
        System.out.println("Bill Amount: " + amt);
    }
}

import java.util.Scanner;

public class KboatBuzzAutomorphic
{
    public static void main(String args[]) {
        Scanner in = new Scanner(System.in);
        System.out.println("1. Buzz number");
        System.out.println("2. Automorphic number");
        System.out.print("Enter your choice: ");
        int choice = in.nextInt();
        System.out.print("Enter number: ");
        int num = in.nextInt();

        switch (choice) {
            case 1:
            if (num % 10 == 7 || num % 7 == 0)
                System.out.println(num + " is a Buzz Number");
            else
                System.out.println(num + " is not a Buzz Number");
            break;

            case 2:
            int sq = num * num;
            int d = 0;
            int t = num;

            /*
             * Count the number of 
             * digits in num
             */
            while(t > 0) {
                d++;
                t /= 10;
            }

            /*
             * Extract the last d digits
             * from square of num
             */
            int ld = (int)(sq % Math.pow(10, d));

            if (ld == num)
                System.out.println(num + " is automorphic");
            else
                System.out.println(num + " is not automorphic");
            break;

            default:
            System.out.println("Incorrect Choice");
            break;
        }
    }
}

import java.util.Scanner;

public class KboatStudentGrades
{
    public static void main(String args[]) {
        Scanner in = new Scanner(System.in);
        System.out.print("Enter name of student: ");
        String n = in.nextLine();
        System.out.print("Enter class of student: ");
        int c = in.nextInt();
        System.out.print("Enter roll no of student: ");
        int r = in.nextInt();
        System.out.print("Enter marks in 1st subject: ");
        int m1 = in.nextInt();
        System.out.print("Enter marks in 2nd subject: ");
        int m2 = in.nextInt();
        System.out.print("Enter marks in 3rd subject: ");
        int m3 = in.nextInt();
        System.out.print("Enter marks in 4th subject: ");
        int m4 = in.nextInt();
        System.out.print("Enter marks in 5th subject: ");
        int m5 = in.nextInt();
        int t = m1 + m2 + m3 + m4 + m5;
        double p = t / 500.0 * 100.0;
        String g = "";
        if (p >= 90)
            g = "A+";
        else if (p >= 80)
            g = "A";
        else if (p >=70)
            g = "B+";
        else if (p >= 60)
            g = "B";
        else if (p >= 50)
            g = "C";
        else if (p >= 40)
            g = "D";
        else
            g = "E";
            
        System.out.println("Total Marks = " + t);
        System.out.println("Percentage = " + p);
        System.out.println("Grade = " + g);
    }
}

import java.util.Scanner;

public class KboatPythagoreanTriplet
{
    public static void main(String args[]) {
        Scanner in = new Scanner(System.in);
        System.out.print("Enter 1st number: ");
        int a = in.nextInt();
        System.out.print("Enter 2nd number: ");
        int b = in.nextInt();
        System.out.print("Enter 3rd number: ");
        int c = in.nextInt();
        
        if (a * a + b * b == c * c ||
            a * a + c * c == b * b ||
            b * b + c * c == a * a)
            System.out.println("Pythagorean Triplets");
        else
            System.out.println("Not Pythagorean Triplets");
    }
}

import java.util.Scanner;

public class KboatTemperature
{
    public static void main(String args[]) {
        Scanner in = new Scanner(System.in);
        System.out.println("Type 1 for Fahrenheit to Celsius");
        System.out.println("Type 2 for Celsius to Fahrenheit");
        int choice = in.nextInt();
        double ft = 0.0, ct = 0.0;

        switch (choice) {
            case 1:
                System.out.print("Enter temperature in Fahrenheit: ");
                ft = in.nextDouble();
                ct = (ft - 32) * 5 / 9.0;
                System.out.println("Temperature in Celsius: " + ct);
                break;

            case 2:
                System.out.print("Enter temperature in Celsius: ");
                ct = in.nextDouble();
                ft = 9.0 / 5.0 * ct + 32;
                System.out.println("Temperature in Fahrenheit: " + ft);
                break;

            default:
                System.out.println("Incorrect Choice");
                break;
        }
    }
}

import java.util.Scanner;

public class KboatStarMall
{
    public static void main(String args[]) {
        Scanner in = new Scanner(System.in);
        System.out.print("Enter purchase amount: ");
        double amt = in.nextDouble();
        System.out.print("Enter item code: ");
        char code = in.next().charAt(0);
        int d = 0;
        switch (code) {
            case 'L':
            d = 5;
            break;
            
            case 'D':
            d = 7;
            break;
            
            case 'X':
            d = 10;
            break;
            
            case 'P':
            d = 11;
            break;
            
            default:
            System.out.println("Invalid Item Code");
        }
        
        double disc = amt * d / 100.0;
        double total = amt - disc;
        
        System.out.println("Total amount payable = " + total);
    }
}

import java.util.Scanner;

public class KboatClothDiscount
{
    public static void main(String args[]) {
        Scanner in = new Scanner(System.in);
        System.out.print("Enter total cost: ");
        double cost = in.nextDouble();
        double amt;
        
        if (cost < 2000) {
            amt = cost - (cost * 5 / 100.0);
        }
        else if (cost < 5000) {
            amt = cost - (cost * 25 / 100.0);
        }
        else if (cost < 10000) {
            amt = cost - (cost * 35 / 100.0);
        }
        else {
            amt = cost - (cost * 50 / 100.0);
        }
        
        System.out.println("Amount to be paid: " + amt);
        
    }
}

import java.util.Scanner;

public class KboatDiscount
{
    public static void main(String args[]) {
        Scanner in = new Scanner(System.in);
        System.out.print("Enter Cloth length: ");
        int l = in.nextInt();
        System.out.print("Enter Total Amount of purchase: ");
        double a = in.nextDouble();
        System.out.println("Enter D for Dealer: ");
        System.out.println("Enter R for Retailer: ");
        System.out.print("Enter customer type: ");
        char type = in.next().charAt(0);
        type = Character.toUpperCase(type);
        int d = 0;
        switch (type) {
            case 'D':
            if (l <= 1000)
                d = 20;
            else if (l <= 2000)
                d = 25;
            else
                d = 35;
            break;
            
            case 'R':
            if (l <= 1000)
                d = 15;
            else if (l <= 2000)
                d = 20;
            else
                d = 25;
            break;
            
            default:
            System.out.println("Wrong choice");
        }
        
        double disc = a * d / 100.0;
        double amt = a - disc;
        
        System.out.println("Amount to be paid = " + amt);
    }
}

import java.util.Scanner;

public class KboatRupeeDollar
{
    public static void main(String args[]) {
        Scanner in = new Scanner(System.in);
        System.out.println("Type 1 for Rupee to Dollar conversion: ");
        System.out.println("Type 2 for Dollar to Rupee conversion: ");
        System.out.print("Enter your choice: ");
        int choice = in.nextInt();
        switch (choice) {
            case 1:
            System.out.print("Enter rupee amount: ");
            double r1 = in.nextDouble();
            double d1 = r1 / 77;
            System.out.println(r1 + " rupees => " + d1 + " dollars");
            break;
            
            case 2:
            System.out.print("Enter dollar amount: ");
            double d2 = in.nextDouble();
            double r2 = d2 * 77;
            System.out.println(d2 + " dollars => " + r2 + " rupees");
            break;
            
            default:
            System.out.println("Incorrect Choice");
        }
    }
}

import java.util.Scanner;

public class KboatCookies
{
    public static void main(String args[]) {
        Scanner in = new Scanner(System.in);
        System.out.print("Enter total no. of cookies: ");
        int cookieCount = in.nextInt();
        System.out.print("Enter no. of cookies per box: ");
        int cookiePerBox = in.nextInt();
        System.out.print("Enter no. of boxes per container: ");
        int boxPerContainer = in.nextInt();
        
        int numBox = cookieCount / cookiePerBox;
        if (cookieCount % cookiePerBox != 0)
            numBox++;
            
        int numContainer = numBox / boxPerContainer;
        if (cookieCount % cookiePerBox != 0)
            numContainer++;
            
        System.out.println("No. of boxes = " + numBox);
        System.out.println("No. of containers = " + numContainer);
    }
}

import java.util.Scanner;

public class KboatTimeConversion
{
    public static void main(String args[]) {
        Scanner in = new Scanner(System.in);
        System.out.println("Conversion Table");
        System.out.println("================");
        System.out.println("1. Milliseconds to Seconds");
        System.out.println("2. Milliseconds to Minutes");
        System.out.println("3. Seconds to Milliseconds");
        System.out.println("4. Seconds to Minutes");
        System.out.println("5. Minutes to Milliseconds");
        System.out.println("6. Minutes to Seconds");
        System.out.print("Enter your choice: ");
        int choice = in.nextInt();
        double ip = 0, op = 0;
        switch (choice) {
            case 1:
            System.out.print("Enter Milliseconds: ");
            ip = in.nextDouble();
            op = ip / 1000;
            System.out.println("Seconds = " + op);
            break;
            
            case 2:
            System.out.print("Enter Milliseconds: ");
            ip = in.nextDouble();
            op = ip / 1000 / 60;
            System.out.println("Minutes = " + op);
            break;
            
            case 3:
            System.out.print("Enter Seconds: ");
            ip = in.nextDouble();
            op = ip * 1000;
            System.out.println("Milliseconds = " + op);
            break;
            
            case 4:
            System.out.print("Enter Seconds: ");
            ip = in.nextDouble();
            op = ip / 60;
            System.out.println("Minutes = " + op);
            break;
            
            case 5:
            System.out.print("Enter Minutes: ");
            ip = in.nextDouble();
            op = ip * 60 * 1000;
            System.out.println("Milliseconds = " + op);
            break;
            
            case 6:
            System.out.print("Enter Minutes: ");
            ip = in.nextDouble();
            op = ip * 60;
            System.out.println("Seconds = " + op);
            break;
            
            default:
            System.out.println("Incorrect choice");
        }
    }
}

import java.util.Scanner;

public class KboatNumber
{
    public static void main(String args[]) {
        Scanner in = new Scanner(System.in);
        System.out.println("Type 1 for Composite Number");
        System.out.println("Type 2 for Smallest Digit");
        System.out.print("Enter your choice: ");
        int ch = in.nextInt();
        
        switch (ch) {
            case 1:
            System.out.print("Enter Number: ");
            int n = in.nextInt();
            int c = 0;
            for (int i = 1; i <= n; i++) {
                if (n % i == 0)
                    c++;
            }
            
            if (c > 2)
                System.out.println("Composite Number");
            else
                System.out.println("Not a Composite Number");
            break;
            
            case 2:
            System.out.print("Enter Number: ");
            int num = in.nextInt();
            int s = 10;
            while (num != 0) {
                int d = num % 10;
                if (d < s)
                    s = d;
                num /= 10;
            }
            System.out.println("Smallest digit is " + s);
            break;
            
            default:
            System.out.println("Wrong choice");
        }
    }
}

import java.util.Scanner;

public class KboatTaxi
{
    public static void main(String args[]) {
        Scanner in = new Scanner(System.in);
        System.out.println("Type 1 for Micro Taxi");
        System.out.println("Type 2 for Macro Taxi");
        System.out.println("Type 3 for Shared Taxi");
        System.out.print("Enter Taxi Type: ");
        int ch = in.nextInt();
        System.out.print("Enter distance travelled: ");
        int dist = in.nextInt();
        double fare = 0;
        
        switch (ch) {
            case 1:
            fare = 10.05;
            break;
            
            case 2:
            fare = 15.05;
            break;
            
            case 3:
            fare = 7.05;
            break;
            
            default:
            System.out.println("Wrong choice");
        }
        
        double totalFare = fare * dist;
        System.out.println("Total Fare = " + totalFare);
    }
}

import java.util.Scanner;

public class KboatLibrary
{
    public static void main(String args[]) {
        Scanner in = new Scanner(System.in);
        System.out.print("Enter name: ");
        String name = in.nextLine();
        System.out.print("Days late: ");
        int days = in.nextInt();
        System.out.println("Type M for Magazine");
        System.out.println("Type T for Text book");
        System.out.print("Enter book type: ");
        char type = in.next().charAt(0);
        int fine = 0;
        switch (type) {
            case 'M':
            if (days <= 5)
                fine = 1;
            else if (days <= 10)
                fine = 2;
            else if (days <= 15)
                fine = 3;
            else if (days <= 20)
                fine = 5;
            else
                fine = 6;
            break;
            
            case 'T':
            if (days <= 5)
                fine = 2;
            else if (days <= 10)
                fine = 3;
            else if (days <= 15)
                fine = 4;
            else if (days <= 20)
                fine = 6;
            else
                fine = 7;
            break;
            
            default:
            System.out.println("Invalid book type");
        }
        
        int totalFine = fine * days;
        System.out.println("Name: " + name);
        System.out.println("Total Fine: " + totalFine);
    }
}