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C Programming Code Examples

C > Functions Code Examples

How to call a function in C?

How to call a function in C?

A function is a block of statements that performs a specific task. Suppose you are building an application in C language and in one of your program, you need to perform a same task more than once.

Creating a user defined function addition()

#include <stdio.h>
int addition(int number1, int number2)
{
     int sum;
     /* Arguments are used here*/
     sum = number1+number2;

     /* Function return type is integer so we are returning
      * an integer value, the sum of the passed numbers.
      */
     return sum;
}

int main()
{
     int var1, var2;
     printf("Enter number 1: ");
     scanf("%d",&var1);
     printf("Enter number 2: ");
     scanf("%d",&var2);

     /* Calling the function here, the function return type
      * is integer so we need an integer variable to hold the
      * returned value of this function.
      */
     int res = addition(var1, var2);
     printf ("Output: %d", res);

     return 0;
}

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