#include <stdio.h>

/* Prints out a value of e until the order n */
int main()
{
  /* Declare and initialize variables if necessary */
  int number, i, j;
  float e = 1.0f, fac_sum = 1.0f;

  /* Prompt the user to enter a number and scan it */
  printf("Please enter a number: ");
  scanf("%d", &number);

  /* Main for loop */
  for (i = 1; i <= number; i++) {
    /* Calculates the factorial of n */
    for (j = number; j > 0; j--) {
      fac_sum *= j;
    }
    e += 1.0f / fac_sum;
    fac_sum = 1.0f;
  }

  /* Print the value of e*/
  printf("Your value of e is: %f", e);

  return 0;
}