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|
{{alias}}( x )
Evaluates the signum function for a double-precision floating-point number.
Value | Sign
----- | -----
x > 0 | +1
x < 0 | -1
0 | 0
-0 | -0
NaN | NaN
Parameters
----------
x: number
Input value.
Returns
-------
sign: number
Function value.
Examples
--------
> var sign = {{alias}}( -5.0 )
-1.0
> sign = {{alias}}( 5.0 )
1.0
> sign = {{alias}}( -0.0 )
-0.0
> sign = {{alias}}( 0.0 )
0.0
> sign = {{alias}}( NaN )
NaN
See Also
--------
|
