# Program to find Sum of a Series a^1/1! + a^2/2! + a^3/3! + a^4/4! +…….+ a^n/n! in C++

C++Server Side ProgrammingProgramming

In this tutorial, we will be discussing a program to find Sum of a Series a^1/1! + a^2/2! + a^3/3! + a^4/4! +…….+ a^n/n!

For this we will be provided with the value of a. Our task is to find the sum of the given series according to the given value of a.

## Example

Live Demo

#include<bits/stdc++.h>
using namespace std;
//calculating sum of given series
double sumOfSeries(double a,double num) {
double res = 0,prev=1;
for (int i = 1; i <= num; i++) {
prev *= (a/i);
res = res + prev;
}
return(res);
}
int main() {
double n = 5, a=2;
cout << sumOfSeries(a,n);
return 0;
}

## Output

6.26667
Published on 27-May-2020 13:06:28
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