Series of e

#include <stdio.h>

double e(double x);

int main()
{
    double x;

    printf("Enter x: ");
    scanf("%lf", &x);

    printf("e ^ %lf = %lf\n", x, e(x));

    return 0;
}

double e(double x)
{
    double ans = 0;
    double term = 1;
    int i;

    for(i = 1; i < 10; i++)
    {
        ans += term;
        term *= x/i;
    }

    return ans;
}