Q: Give the output of the following method:

	public static void main(String args[]){
 	int a = 5;
    a++;
    System.out.println(a);

    a -= (a--) - (--a);
    System.out.println(a);

	}

 

Let's analyze the given Java code to determine its output:

Code:

public static void main(String[] args) {
    int a = 5;
    a++;
    System.out.println(a);
    
    a -= (a--) - (--a);
    System.out.println(a);
}
        

Explanation:

1. Initial Code Analysis:

   - int a = 5; initializes a with the value 5.
   - a++; increments a by 1. After this operation, a becomes 6.
   - System.out.println(a); prints the value of a, which is 6.

2. Second Part of the Code:

   - a-- is the post-decrement operator. It returns the value of a before decrementing it. So, a-- evaluates to 6, and then a is decremented to 5.
   - --a is the pre-decrement operator. It decrements a first, so --a evaluates to 4, and a becomes 4.
   - Therefore, the expression a -= (a--) - (--a) translates to a -= 6 - 4:

   • 6 - 4 evaluates to 2.
   • Thus, a -= 2 is equivalent to a = a - 2. Since a is 4 at this point, this becomes 4 - 2, which results in 2.

   - System.out.println(a); prints the value of a, which is 4.

Conclusion:

The output of the program is:

• 6 (after the a++ operation)
• 4 (after the a -= (a--) - (--a) operation)