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{{alias}}( x )
Computes the principal square root of `1+x` minus one.
This function is more accurate than the obvious approach for small `x`.
Parameters
----------
x: number
Input value.
Returns
-------
y: number
Square root of `1+x` minus one.
Examples
--------
> var y = {{alias}}( 3.0 )
1.0
> y = {{alias}}( 0.5 )
~0.225
> y = {{alias}}( 0.02 )
~0.01
> y = {{alias}}( -0.5 )
~-0.293
> y = {{alias}}( -1.1 )
NaN
> y = {{alias}}( NaN )
NaN
See Also
--------
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