SGN
===

Function
--------

**SGN** returns the value of the sign of the argument.

Syntax
------

SGN(N)

where N is a numeric expression.

Examples
--------

::

   A = SGN (-9.5)

sets A equal to -1

::

   A = SGN(0)

sets A equal to 0

::

   A = SGN(1.76E9)

sets A equal to 1

Remarks
-------

Result:

-  1 if Positive
-  0 if Zero
-  -1 if Negative