#include <stdio.h>

int product (int, int);//function declaration
int main (void)
{
int total;
printf ("\n\n function : a simple structure of function :\n");
printf ("——————————————————\n");
total = product (5,6); //function call
printf ("The product is : %d\n" , total);
return 0;
}

int product (int a , int b) //function definition
{

int s;
s=a*b;
return s; //function returning a value

}