1. Introduction

In Java, ++ operator is used for incrementing the value of a variable by 1. There are two types of increment operators: pre-increment and post-increment. The pre-increment operator (++variable) increases the value of the variable before its current value is used in an expression. The post-increment operator (variable++) uses the current value in the expression and then increases the value of the variable. This program demonstrates the use of pre and post increment operators in Java.

2. Program Steps

1. Define a class named IncrementDemo.

2. In the main method, initialize two integer variables, num1 and num2, with some values.

3. Demonstrate the use of pre-increment on num1 and print the result.

4. Demonstrate the use of post-increment on num2 and print the result.

5. Print the final values of num1 and num2.

3. Code Program

public class IncrementDemo { // Step 1: Define a class named IncrementDemo

    public static void main(String[] args) { // Main method
        int num1 = 5; // Step 2: Initialize num1 with 5
        int num2 = 5; // Step 2: Initialize num2 with 5

        // Step 3: Demonstrate the use of pre-increment on num1 and print the result
        System.out.println("Using Pre-Increment: " + (++num1));

        // Step 4: Demonstrate the use of post-increment on num2 and print the result
        System.out.println("Using Post-Increment: " + (num2++));

        // Step 5: Print the final values of num1 and num2
        System.out.println("Final value of num1: " + num1);
        System.out.println("Final value of num2: " + num2);
    }
}

Output:

Using Pre-Increment: 6
Using Post-Increment: 5
Final value of num1: 6
Final value of num2: 6

4. Step By Step Explanation

– Step 1: We define a class named IncrementDemo.

– Step 2: Inside the main method, we initialize two integer variables, num1 and num2, both with the value 5.

– Step 3: We use the pre-increment operator on num1, which increases its value to 6 before it is printed. Hence, "Using Pre-Increment: 6" is printed.

– Step 4: We use the post-increment operator on num2. The current value of num2, which is 5, is printed first, and then num2 is increased to 6. So, "Using Post-Increment: 5" is printed.

– Step 5: Finally, we print the final values of num1 and num2, which are both 6.