addition in c using function code example

Example 1: addition of two numbers in c

int num1,num2;
printf("%d",num1+num2);

Example 2: addition in c

/*Program for adding two numbers*/
#include <stdio.h>
int main(){
	int a, b, sum; //declare the variables that will be used, a will store the first number, b second number and sum, the sum.
    printf("Enter the first number: \n"); //Prompts user to enter the first number.
    scanf("%d", &a);//Accepts input and saves it to variable a
    printf("Enter the second number: \n");
    scanf("%d", &b);
    sum = a + b; //Formular to add the two numbers.
    printf("Sum is %d", sum);
}