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{{alias}}( x )
Computes the reciprocal square root of a double-precision floating-point
number.
For `x < 0`, the reciprocal square root is not defined.
Parameters
----------
x: number
Input value.
Returns
-------
y: number
Reciprocal square root.
Examples
--------
> var y = {{alias}}( 4.0 )
0.5
> y = {{alias}}( 100.0 )
0.1
> y = {{alias}}( 0.0 )
Infinity
> y = {{alias}}( Infinity )
0.0
> y = {{alias}}( -4.0 )
NaN
> y = {{alias}}( NaN )
NaN
See Also
--------
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