For programmers, testers and tech geeks

use of cmath in C++

#include<iostream>
#include<conio.h>
#include<cmath>
using namespace std;
void main()
{
    double number,answer;
    cout<<"Enter the number =";
    cin>>number;
    answer=sqrt(number);
    cout<<"The square of nmuber is ="<<answer;
    getch();
}