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signbit

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< c‎ | numeric‎ | math
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signbit
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Macro constants
 
Defined in header <math.h>
#define signbit(arg) /* implementation defined */
(since C99)

Determines if the given floating point number arg is negative. The macro returns an integral value.

Parameters

arg - floating point value

Return value

Nonzero integral value if arg is negative, 0 otherwise

See also

absolute value of a floating point value (|x|)
(function) [edit]
copies the sign of a floating point value
(function) [edit]
C++ documentation for signbit