Ejercicio 12.3

#include <stdio.h>
suma(int n){
    int sum = 0;
    for (int i = 1; i <= n; i++){
        sum = sum+i;
    } printf("%d",sum);
}
int main(){
    int n,sum;
    printf("Dame n: ");
    scanf("%d",&n);
    suma(n);
}