mojave man page for isfinite

Query: isfinite

OS: mojave

Section: 3

Format: Original Unix Latex Style Formatted with HTML and a Horizontal Scroll Bar

FPCLASSIFY(3)						   BSD Library Functions Manual 					     FPCLASSIFY(3)

NAME
fpclassify, isfinite, isinf, isnan, isnormal -- classify a floating-point number
LIBRARY
Math Library (libm, -lm)
SYNOPSIS
#include <math.h> int fpclassify(real-floating x); int isfinite(real-floating x); int isinf(real-floating x); int isnan(real-floating x); int isnormal(real-floating x);
DESCRIPTION
The fpclassify() macro takes an argument of x and returns one of the following manifest constants. FP_INFINITE Indicates that x is an infinite number. FP_NAN Indicates that x is not a number (NaN). FP_NORMAL Indicates that x is a normalized number. FP_SUBNORMAL Indicates that x is a denormalized number. FP_ZERO Indicates that x is zero (0 or -0). The isfinite() macro returns a non-zero value if and only if its argument has a finite (zero, subnormal, or normal) value. The isinf(), isnan(), and isnormal() macros return non-zero if and only if x is an infinity, NaN, or a non-zero normalized number, respectively.
SEE ALSO
isgreater(3), math(3), signbit(3)
STANDARDS
The fpclassify(), isfinite(), isinf(), isnan(), and isnormal() macros conform to ISO/IEC 9899:1999 (``ISO C99'').
HISTORY
3BSD introduced isinf() and isnan() functions, which accepted double arguments; these have been superseded by the macros described above.
BSD
December 11, 2006 BSD
Related Man Pages
isnan(3) - mojave
isnormal(3) - mojave
fpclassify(3) - osx
isinf(3) - osx
isnan(3) - osx
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