By | 25.12.2016

# Sum of Square of first n Natural numbers

Write a C++ Program to Find Sum of Square of first n Natural numbers. Here’s simple C++ Program to Find Sum of Square of first n Natural numbers in C++ Programming Language.

## Numbers in C++

Normally, when we work with Numbers, we use primitive data types such as int, short, long, float and double, etc. The number data types, their possible values and number ranges have been explained while discussing C++ Data Types.

Here is source code of the C++ Program to Find Sum of Square of first n Natural numbers. The C++ program is successfully compiled and run(on Codeblocks) on a Windows system. The program output is also shown in below.

### SOURCE CODE : :

```/* C++ Program to Find Sum of Square of first n Natural numbers  */

#include<iostream>

using namespace std;

int main()
{
unsigned long n,i,sum=0,d;
cout<<"Enter any number :: ";
cin>>n;

for(i=1;i<=n;++i)
{
d=i*i;
sum+=d;
}

cout<<"\nSum of square of [ "<<n<<" ] Numbers = "<<sum<<"\n";
return 0;
}```

### OUTPUT : :

```/* C++ Program to Find Sum of Square of first Natural numbers  */

Enter any number :: 10

Sum of square of [ 10 ] Numbers = 385

Process returned 0```

Above is the source code for C++ Program to Find Sum of Square of first Natural numbers which is successfully compiled and run on Windows System.The Output of the program is shown above .

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