Swapping of two number using variable

#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, firstNumber = %.2lf\n", firstNumber); printf("After swapping, secondNumber = %.2lf", secondNumber); return 0; }