C Program to Swap two no’s without using third variable

C Program to Swap two no’s without using third variable
 #include<stdio.h>

int main() {
   int a, b;

   printf("\nEnter value for num1 & num2 : ");
   scanf("%d %d", &a, &b);

   a = a + b;
   b = a - b;
   a = a - b;

   printf("\nAfter swapping value of a : %d", a);
   printf("\nAfter swapping value of b : %d", b);

   return (0);
}

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