SIGN
Platform  x64, Win32, .NET 
Purpose 
To form a number from the absolute value of one number and the sign of another. 
Class 
Elemental function. 
Syntax 
FUNCTION SIGN(A, B) 
Description 
A can be integer or real. B and the result of the function have the same type
as A.

Return value 
The result is formed by taking the absolute value of A and multiplying by 1 if
B is negative. If B is zero the result may be unsafe. 

