Let’s have a look at the Sum of N Numbers Program In C Using Functions allows the user to enter N integer by using the function.

In C Programming Language, a function is combined with a block of code that can be called or used anywhere in the program by calling the name.

Body of a function starts with`{`

and ends with `}`

. This is similar to the main function.

## C Program To Find Sum of N Numbers Using Functions

#include<stdio.h> /* Learn C Programming at www.Codetaglance.com */ int Sum_Functions(int N); int main() { int N, i, Sum = 0; printf("\nPlease Enter any Integer of your choice\n"); scanf("%d", &N); Sum = Sum_Functions(N); printf("Sum= %d", Sum); return 0; } int Sum_Functions(int N) { int i, Sum = 0; if (N == 0) { return N; } else { return (N* (N + 1) / 2); } }

**Output:**

Please Enter any Integer of your choice

501

Sum= 6