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Practice Programs on Conditional Statements

By / 2 August 2026 / 4 minutes of reading

1. Simple if Statement

This program checks whether the entered number is positive. If the condition is true, it prints that the number is positive.

import java.util.Scanner;

public class PositiveNumber {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        System.out.print("Enter a number: ");
        int num = sc.nextInt();

        if (num > 0) {
            System.out.println("The number is positive.");
        }

        sc.close();
    }
}
Input and Output:
Enter a number: 15
The number is positive.

2.If-Else Statement

This program determines whether the entered number is even or odd. It uses the if-else statement to display the appropriate result.

import java.util.Scanner;

public class EvenOdd {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        System.out.print("Enter a number: ");
        int num = sc.nextInt();

        if (num % 2 == 0) {
            System.out.println("Even Number");
        } else {
            System.out.println("Odd Number");
        }

        sc.close();
    }
}
Input and Output:
Enter a number: 2
Even NumberCode language: JavaScript (javascript)

3. Nested If

This program compares three numbers using nested if statements. It displays the largest number entered by the user.

import java.util.Scanner;

public class LargestNumber {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        System.out.print("Enter first number: ");
        int a = sc.nextInt();

        System.out.print("Enter second number: ");
        int b = sc.nextInt();

        System.out.print("Enter third number: ");
        int c = sc.nextInt();

        if (a > b) {
            if (a > c) {
                System.out.println("Largest Number = " + a);
            } else {
                System.out.println("Largest Number = " + c);
            }
        } else {
            if (b > c) {
                System.out.println("Largest Number = " + b);
            } else {
                System.out.println("Largest Number = " + c);
            }
        }

        sc.close();
    }
}
Input and Output:
Enter first number: 12
Enter second number: 14
Enter third number: 16
Largest Number = 16Code language: JavaScript (javascript)

4. If-Else-If Ladder

This program calculates the student’s grade using an if-else-if ladder. Different grade messages are displayed according to the entered marks.

import java.util.Scanner;

public class GradeCalculator {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        System.out.print("Enter Marks: ");
        int marks = sc.nextInt();

        if (marks >= 90) {
            System.out.println("Grade A");
        } else if (marks >= 80) {
            System.out.println("Grade B");
        } else if (marks >= 70) {
            System.out.println("Grade C");
        } else if (marks >= 60) {
            System.out.println("Grade D");
        } else {
            System.out.println("Fail");
        }

        sc.close();
    }
}
Input and Output:
Enter Marks: 76
Grade C

5.Traditional Switch Statement

This program displays the day corresponding to a number from 1 to 7. It uses the traditional switch statement with break statements.

import java.util.Scanner;

public class DayName {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        System.out.print("Enter day number (1-7): ");
        int day = sc.nextInt();

        switch (day) {
            case 1:
                System.out.println("Sunday");
                break;
            case 2:
                System.out.println("Monday");
                break;
            case 3:
                System.out.println("Tuesday");
                break;
            case 4:
                System.out.println("Wednesday");
                break;
            case 5:
                System.out.println("Thursday");
                break;
            case 6:
                System.out.println("Friday");
                break;
            case 7:
                System.out.println("Saturday");
                break;
            default:
                System.out.println("Invalid Day Number");
        }

        sc.close();
    }
}
Input and Output:
Enter day number (1-7): 5
Thursday

6. Switch Expression (->)

This program uses the modern switch expression with arrow (->) syntax. It makes the code shorter and easier to read.

import java.util.Scanner;

public class MonthName {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        System.out.print("Enter month number (1-12): ");
        int month = sc.nextInt();

        switch (month) {
            case 1 -> System.out.println("January");
            case 2 -> System.out.println("February");
            case 3 -> System.out.println("March");
            case 4 -> System.out.println("April");
            case 5 -> System.out.println("May");
            case 6 -> System.out.println("June");
            case 7 -> System.out.println("July");
            case 8 -> System.out.println("August");
            case 9 -> System.out.println("September");
            case 10 -> System.out.println("October");
            case 11 -> System.out.println("November");
            case 12 -> System.out.println("December");
            default -> System.out.println("Invalid Month");
        }

        sc.close();
    }
}
Input and Output:
Enter month number (1-12): 10
October

7. Switch Expression with yield

This program calculates the employee’s bonus percentage using a switch expression. The yield keyword returns a value from each case block.

import java.util.Scanner;

public class EmployeeBonus {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        System.out.print("Enter Employee Rating (A/B/C): ");
        char rating = sc.next().charAt(0);

        int bonus = switch (rating) {
            case 'A' -> {
                System.out.println("Excellent Performance");
                yield 20;
            }
            case 'B' -> {
                System.out.println("Good Performance");
                yield 10;
            }
            case 'C' -> {
                System.out.println("Average Performance");
                yield 5;
            }
            default -> {
                System.out.println("Invalid Rating");
                yield 0;
            }
        };

        System.out.println("Bonus Percentage = " + bonus + "%");

        sc.close();
    }
}
Input and Output:
Enter Employee Rating (A/B/C): A
Excellent Performance
Bonus Percentage = 20%
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