By | 25.12.2016

# Square Root of a Number

Write a C++ program to find Square Root of a Number. Here’s simple program to find Square Root of a Number using pow( ) function in C++ Programming Language.

For calculate Square Root of a number we multiply number by 0.5 because square root of any number means power of 1/2 and 1/2=0.5.

• pow( ) is a predefined function in math.h header file, it is used for calculate power of any number.

And one another method for this program is use sqrt( ) function it is pre-defined in math.h header file.

• sqrt() is a predefined function in math.h header file, it is used for calculate square root of any number.

Here is source code of the C++ program to find Square Root of a Number. 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 Square Root of a Number  */

#include<iostream>
#include<math.h>
using namespace std;

int main()
{
int num;
double ans;

cout<<"Enter any positive integer :: ";
cin>>num;

ans=pow((double)num,(double)0.5);

cout<<"\nSquare Root of [ "<<num<<" ] is :: "<<ans<<"\n";

return 0;
}```

### Output : :

```/*  C++ program to find Square Root of a Number  */

Enter any positive integer :: 50

Square Root of [ 50 ] is :: 7.07107

Process returned 0```

Above is the source code for C++ program to find Square Root of Number which is successfully compiled and run on Windows System.The Output of the program is shown above .

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