Adding numbers in c using function

We have used long data type as it can handle large numbers.

#include<stdio.h>

long addition(long, long);

main()

{

   long first, second, sum;

   scanf("%ld%ld", &first, &second);

   sum = addition(first, second);

   printf("%ld\n", sum);

   return 0;

}

long addition(long a, long b)

{

   long result;

   result = a + b;

   return result;

}