C Program to Swap Two Numbers

This C program will swap the two entered numbers by using the temporary variable. This is a simple & easy program in the programming language. See the below example:

C Program to Swap Two Numbers

#include <stdio.h>
int main()
{
      double firstNumber, secondNumber, temporaryVariable;

      printf("Enter first number: ");
      scanf("%lf", &firstNumber);

      printf("Enter second number: ");
      scanf("%lf",&secondNumber);

      // Value of firstNumber is assigned to temporaryVariable
      temporaryVariable = firstNumber;

      // Value of secondNumber is assigned to firstNumber
      firstNumber = secondNumber;

      // Value of temporaryVariable (which contains the initial value of firstNumber) is assigned to secondNumber
      secondNumber = temporaryVariable;

      printf("\nAfter swapping, first number = %.2lf\n", firstNumber);
      printf("After swapping, second number = %.2lf", secondNumber);

      return 0;
}

#include <stdio.h>

int main()

{

double firstNumber, secondNumber, temporaryVariable;

printf("Enter first number: ");

scanf("%lf", &firstNumber);

printf("Enter second number: ");

scanf("%lf",&secondNumber);

// Value of firstNumber is assigned to temporaryVariable

temporaryVariable = firstNumber;

// Value of secondNumber is assigned to firstNumber

firstNumber = secondNumber;

// Value of temporaryVariable (which contains the initial value of firstNumber) is assigned to secondNumber

secondNumber = temporaryVariable;

printf("\nAfter swapping, first number = %.2lf\n", firstNumber);

printf("After swapping, second number = %.2lf", secondNumber);

return 0;

}

Output is:

Enter first number: 40
Enter second number: 50

After swapping, first number = 50
After swapping, second number = 40

Enter first number: 40

Enter second number: 50

After swapping, first number = 50

After swapping, second number = 40

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C Program to Swap Two Numbers

C Program to Swap Two Numbers

Output is:

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