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Java Program: Demonstrate compound assignment operators (+=, -=, etc.)

Java

public class CompoundAssignmentDemo {
    public static void main(String[] args) {
 
        int a = 20;
 
        System.out.println("Initial value of a: " + a);
 
        // += operator
        a += 5;   // a = a + 5
        System.out.println("After a += 5  → " + a);
 
        // -= operator
        a -= 3;   // a = a - 3
        System.out.println("After a -= 3  → " + a);
 
        // *= operator
        a *= 2;   // a = a * 2
        System.out.println("After a *= 2  → " + a);
 
        // /= operator
        a /= 4;   // a = a / 4
        System.out.println("After a /= 4  → " + a);
 
        // %= operator
        a %= 3;   // a = a % 3
        System.out.println("After a %= 3  → " + a);
    }
}

Output

OUTPUT :
Initial value of a: 20
After a += 5  → 25
After a -= 3  → 22
After a *= 2  → 44
After a /= 4  → 11
After a %= 3  → 2

Explanation

✔ 1. What are Compound Assignment Operators?

Compound assignment operators combine an arithmetic operation with assignment.

✔ 2. Operator Meaning Table

Operator	Equivalent Expression
+=	a = a + value
-=	a = a - value
*=	a = a * value
/=	a = a / value
%=	a = a % value

✔ 3. Step-by-Step Execution

Starting value:

a = 20

a += 5 → 20 + 5 = 25
a -= 3 → 25 − 3 = 22
a *= 2 → 22 × 2 = 44
a /= 4 → 44 ÷ 4 = 11
a %= 3 → remainder of 11 ÷ 3 = 2

✔ 4. Why Use Compound Assignment?

✅ Shorter code
✅ Better readability
✅ Faster execution
✅ Commonly used in loops and counters

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Java Program: Demonstrate compound assignment operators (+=, -=, etc.)

Output

Explanation