Example1-Creating a user defined function
#include <stdio.h> int addition(int num1, int num2) { int sum; sum = num1+num2; return sum; } int main() { int number1, number2; printf("Enter number 1: "); scanf("%d",&number1); printf("Enter number 2: "); scanf("%d",&number2); int res = addition(number1, number2); printf ("Output: %d", res); return 0; }
Enter number 1:25 Enter number 2:55 Output:80
Example2: Creating a void user defined function that doesn’t return anything
#include <stdio.h> void introduction() { printf("Welcome to CseWorld Online"); /* There is no return statement inside this function, since its return type is void */ } int main() { introduction(); return 0; }
Welcome to CseWorld Online