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Man Pages


Manual Reference Pages  -  SIGNBIT (3)

NAME

signbit - determine whether a floating-point number’s sign is negative

CONTENTS

Library
Synopsis
Description
See Also
Standards
History

LIBRARY


.Lb libm

SYNOPSIS


.In math.h int signbit real-floating x

DESCRIPTION

The signbit macro takes an argument of x and returns non-zero if the value of its sign is negative, otherwise 0.

SEE ALSO

fpclassify(3), math(3)

STANDARDS

The signbit macro conforms to -isoC-99.

HISTORY

The signbit macro was added in
.Fx 5.1 .
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