Question

Write a program to calculate summation of series
1/1! + 2/2! + 3/3! +….+ n/n!

Answer 1

#include <stdio.h>
#include <conio.h>
double sumseries(double m)
{
double sum2 = 0, f = 1, i;
    for (i = 1; i <= m; i++)
{
        f = f * i;
        sum2 = sum2 +(i / f);
}
return(sum2);
}
double sumseries(double);
main()
{
    double number,sum;
    clrscr();
    printf("\n Enter the value: ");
    scanf("%lf", &number);
    sum = sumseries(number);
    printf("\n Sum of the above series = %lf ", sum);
}

 

Output: Enter the value: 4 Sum of the above series = 2.666667