#include<iostream.h>
#include<conio.h>
int main()
{
int j, i, n, fact ;
float e ;
clrscr();
cout<<"Enter the number upto which series is required : " ;
cin>>n ;
e = 1 ;
for (i=1; i<=n; i++)
{
fact = 1;
for (j=1; j<=i; j++)
{
fact = fact * j ;
}
e = e + (1/fact);
}
cout<<" The result of the required series is : "<<e ;
getch();
return 0;
}