How do you swap the values of two integers without using the third temporary variable? Justify with the example.

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Suresh Chand · Accepted Answer

We can swap two variables without using a third temporary variable using the following methods. By using + and - By using * and / By using + and -: Let's see a simple c example to swap two numbers without using a third variable. #include int main() { int a = 10, b = 20; printf('Before swap a=%d b=%d', a, b); a = a + b; // a=30 (10+20) b = a - b; // b=10 (30-20) a = a - b; // a=20 (30-10) printf('nAfter swap a=%d b=%d', a, b); return 0; } By using * and /: Let's see another example to swap two numbers using * and /. #include int main() { int a = 10, b = 20; printf('Before swap a=%d b=%d', a, b); a = a * b; // a=200 (10*20) b = a / b; // b=10 (200/20) a = a / b; // a=20 (200/10) printf('nAfter swap a=%d b=%d', a, b); return 0; } The output of the above program remains the same. Before swap a=10 b=20 After swap a=20 b=10

How do you swap the values of two integers without using the third temporary variable? Justify with the example.

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How do you swap the values of two integers without using the third temporary variable? Justify with the example.

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