C program to evaluate the series - 1 + x/1 + x/2! + x/3! + ... x/n!

Write a C program to evaluate the series - 1 + x/1 + x/2! + x/3! + ... x/n!

  #include <stdio.h>

  /* calculate factorial for given data */
  int fact(int data) {
        int res = 1;
        while (data > 1) {
                res = res * data;
                data--;
        }
        return res;
  }

  int main() {
        float x, res = 1.0;

        int n, i;
        printf("Enter the value for x:");
        scanf("%f", &x);
        printf("Enter the value for n:");
        scanf("%d", &n);

        /* series evaluation */
        for (i = 1; i <= n; i++) {
                res = res + (x / fact(i));
        }

        printf("Result: %.3f\n", res);
        return 0;
  }

  Output:

  jp@jp-VirtualBox:~/$ ./a.out
  Enter the value for x:10
  Enter the value for n:10
  Result: 18.183