=====sqrt=====
Syntax:

<code>
    #include <cmath>
    double sqrt( double num );
</code>
The sqrt() function returns the square root of num. If num is negative, a
domain error occurs.

C++ also provides the following overloaded forms:
<code>
    #include <cmath>
    float sqrt( float num ); // same as sqrtf() in C99
    long double sqrt( long double num ); // same as sqrtl() in C99
</code>

Related Topics: [[exp]], [[log]], [[pow]]