# C++ Program to Calculate Sum of Series 1³+2³+3³+n³

Write a C++ Program to Calculate Sum of Series 1³+2³+3³+n³ with an example. The math formula to find Sum of Series 1³+2³+3³+……+n³ = (n(n + 1)/6)².

#include<iostream>
#include<cmath>
using namespace std;

int main()
{
int number, sum = 0;

cout << "Enter the Number to find sum of Series 1^3 + 2^3 =  ";
cin >> number;

sum = pow(((number * (number + 1)) / 2), 2);

cout << "\nThe Sum of the Series 1^3 + 2^3 + .. upto " << number << " = " << sum << "\n\n";

return 0;
}
Enter the Number to find sum of Series 1^3 + 2^3 =  10

The Sum of the Series 1^3 + 2^3 + .. upto 10 = 3025

The below shown C++ Program to Calculate Sum of Series 1³+2³+3³+n³ is the same as the above. Here, we used C++ for loop to display the 1³+2³+3³+n³ series as an output.

#include<iostream>
#include<cmath>
using namespace std;

int main()
{
int number, sum = 0;

cout << "Enter the Number to find sum of Series 1^3 + 2^3 =  ";
cin >> number;

sum = pow(((number * (number + 1)) / 2), 2);

cout << "\nThe Sum of the Series 1^3 + 2^3 + .. upto " << number << " = " << sum << "\n\n";

for(int i = 1; i <= number; i++)
{
if (i != number)
cout << i << "^3 + ";
else
cout << i << "^3 = " << sum;
}

return 0;
}

## C++ Program to Calculate Sum of Series 1³+2³+3³+n³ using Functions

#include<iostream>
#include<cmath>
using namespace std;

void sumOf13Series (int number)
{
int sum = 0;

sum = pow(((number * (number + 1)) / 2), 2);

cout << "\nThe Sum of the Series 1^3 + 2^3 + .. upto " << number << " = " << sum << "\n\n";

for(int i = 1; i <= number; i++)
{
if (i != number)
cout << i << "^3 + ";
else
cout << i << "^3 = " << sum;
}
}
int main()
{
int number;

cout << "Enter the Number to find sum of Series 1^3 + 2^3 =  ";
cin >> number;

sumOf13Series (number);

return 0;
}
Enter the Number to find sum of Series 1^3 + 2^3 =  30

The Sum of the Series 1^3 + 2^3 + .. upto 30 = 216225

1^3 + 2^3 + 3^3 + 4^3 + 5^3 + 6^3 + 7^3 + 8^3 + 9^3 + 10^3 + 11^3 + 12^3 + 13^3 + 14^3 + 15^3 + 16^3 + 17^3 + 18^3 + 19^3 + 20^3 + 21^3 + 22^3 + 23^3 + 24^3 + 25^3 + 26^3 + 27^3 + 28^3 + 29^3 + 30^3 = 216225