Program to calculate sum of factorial series using for loop and power function in C.

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/*Program to calculate sum of series

 1/1!+1/2!+1/3!+.......+1/n!.
 by power function.

 where n is the value entered by user
*/

#include<stdio.h>
#include<conio.h>
#include<math.h>
void main()
{
int i,n,j,mul;
float sum;
clrscr();
sum=0;

printf("\nEnter limit number : ");
scanf("%d",&n);


printf("\nSeries=");

printf("\n---------------------\n");

for(i=1;i<=n;i++)
{
mul=1;
printf(" +1/%d! ",i);

for(j=1;j<=i;j++)
{
mul=mul*j;
}

sum=sum+pow(mul,-1); //power function

}

printf("\n---------------------\n");

printf("\nSum of series= %.3f",sum);

getch();
}