public static double Sqr( double x )
Public Shared Function Sqr ( x As Double ) As Double
public: static double Sqr( double x )
static member Sqr : x : float -> float
There is nothing numericaly sophisticated inside this function; it exists simply for programmers' convenience. Given a complicated expression that needs to be squared, it is nice to be able to wrap it in a simple call to this function instead of explicitly assigning its value to a new variable and then, in a seperate statement, multiplying that variable by itself. Even if you are hyper-vigilant about function call overhead, you should not worry about using this function, because even the most basic optimizing compiler will optimize away the call.