#include "stdio.h"

#include "conio.h"

long int factorial(int n);

void main()

{

int n,i;

float s,r;

char c;

clrscr();

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

printf("To 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("The sum of %d terms is %f",n,s);

fflush(stdin);

printf ("Do 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);

}

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