C Language Program To Find Sum Of Series

#include <stdio.h>

#include <conio.h>

long int factorial(int n);

void main()

{

 int n,i;

 float s,r;

 char c;

 clrscr();

 repeat : printf("\nYou have this series:- 1/1! + 2/2! + 3/3! + 4/4! ...");

 printf("\nTo which term you want its sum?  ");

 scanf("%d",&n);

 s=0;

 for (i=1;i<=n;i++)

  {   s=s+((float)i/(float)factorial(i)); }

 printf("\nThe sum of %d terms is %f",n,s);

 fflush(stdin);

 printf ("\nDo you want to continue?(y/n):-  ");

 scanf("%c",&c);

 if (c=='y')

  goto repeat;

 getch();

}

long int factorial(int n)

 {

  if (n<=1)

                return(1);

  else

                n=n*factorial(n-1);

                return(n);

 }

Sample Output :
     You have this series:- 1/1! + 2/2! + 3/3! + 4/4! ...
To which term you want its sum?  15
The sum of 15 terms is 2.709237
Do you want to continue?(y/n):-  n

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