C – Find Sum of N Integer Numbers Using the Function

Write a c program to find the sum of the N integer numbers using the fuctions.
#include <stdio.h>
#include <conio.h>
int sum (int number);
void main()
{
int n;
printf("How many number : ");
scanf("%d", &n);
printf("sum the %d numbers is : %d ",n,sum(n));
getch();
}
int sum(int number){
int i, add=0;
for(i=1; i<=number; i++){
add+=i;
}
return add;
}
Output
