Modern Math IsNegative

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IsNegative

Returns true if the sign bit is set, which includes negative zero.

Syntax

IsNegative( x )

Examples

#import "std/numeric"
using numeric

print IsNegative( -1.0 )      '' true
print IsNegative( 1.0 )       '' false

'' THE SIGN BIT, not the value -- so NEGATIVE ZERO answers true where
'' `x < 0` answers false. That distinction is the whole reason this
'' exists.
print IsNegative( -0.0 )      '' true
print ( -0.0 < 0 )            '' 0 -- i.e. false: the VALUE is not below
                              '' zero, only its sign bit is set

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Library: Math Library
Category: Math Library
Documented under: Nothing Becomes A Keyword