====== sgn ======
{{tag>math}}
''int sgn(num x)''

[[:types|num - any numeric type (int or fixed)]]

===== Description =====
Returns the sign of x as an integer.
  * ''1'' -- x is positive
  * ''0'' -- x is zero
  * ''-1'' -- x is negative
  
===== Examples =====
<code>
sgn(    7) -> 1
sgn(   -7) -> -1
sgn( 12.3) -> 1
sgn(-12.3) -> -1
sgn(    0) -> 0
</code>