C Program to Swap Two Numbers

Hello coders, in this post we will how to write a C Program to Swap Two Numbers, This is a very basic C program.

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C Program to Swap Two Numbers

#include<stdio.h>
int main() {
      double first, second, temp;
      printf("Enter first number: ");
      scanf("%lf", &first);
      printf("Enter second number: ");
      scanf("%lf", &second);
      // Value of first is assigned to temp
      temp = first;
      // Value of second is assigned to first
      first = second;
      // Value of temp (initial value of first) is assigned to second
      second = temp;
      // %.2lf displays number up to 2 decimal points
      printf("\nAfter swapping, firstNumber = %.2lf\n", first);
      printf("After swapping, secondNumber = %.2lf", second);
      return 0;
}

Output:

Enter first number: 1.20
Enter second number: 2.45
After swapping, firstNumber = 2.45
After swapping, secondNumber = 1.20

Conclusion

I hope after going through this post, you understand how to write a C Program to Swap Two Numbers, if there is any case program is not working and showing an error please let me know in the comment section.