Modern Math Cbrt

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Cbrt

Returns the cube root of a number, negative numbers included.

Syntax

Cbrt( x )

Notes

• Defined for negative numbers: Cbrt( -8.0 ) is -2. x ^ ( 1 / 3 ) is NaN for a negative x.
• Overloaded on float64 and on float32: a single-precision argument takes the single-precision path and does not widen.
• BOUNDED accuracy: correct to the platform library's stated ulp bound.

Examples

#import "std/numeric"
using numeric

print Cbrt( 27.0 )           '' 3
print Cbrt( -8.0 )           '' -2 -- a real root for a negative number
print Cbrt( 2.0 )            '' 1.259921049894873

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Library: Math Library
Category: Math Library
Documented under: The libm surface