Write a C++ program to Calculate the sum of the series (1*1) + (2*2) + (3*3) + (4*4) + (5*5) + ... + (n*n), where n is entered by the user.
Program Code:
#include<iostream>
using namespace std;
int main()
{
int i,n;
int sum=0;
cout<<"Enter the value of n for the series : ";
cin>>n;
cout<<endl;
for(i=1;i<=n;i++)
{
sum+=i*i;
}
cout<<"Sum of the series (1*1) + (2*2) + (3*3) ... + (n*n) is : "<<sum;
return 0;
}
The program output is tested on www.jdoodle.com
Output:
Enter the value of n for the series : 15
Sum of the series (1*1) + (2*2) + (3*3) ... + (n*n) is : 1240
Thanks
Mukesh Rajput
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