Man page - fabsf(3)

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Manual

fabs

NAME
LIBRARY
SYNOPSIS
DESCRIPTION
RETURN VALUE
ERRORS
ATTRIBUTES
STANDARDS
HISTORY
SEE ALSO

NAME

fabs, fabsf, fabsl - absolute value of floating-point number

LIBRARY

Math library ( libm , -lm )

SYNOPSIS

#include <math.h>

double fabs(double x );
float fabsf(float x );
long double fabsl(long double x );

Feature Test Macro Requirements for glibc (see feature_test_macros (7)):

fabsf (), fabsl ():
_ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L
|| /* Since glibc 2.19: */ _DEFAULT_SOURCE
|| /* glibc <= 2.19: */ _BSD_SOURCE || _SVID_SOURCE

DESCRIPTION

These functions return the absolute value of the floating-point number x .

RETURN VALUE

These functions return the absolute value of x .

If x is a NaN, a NaN is returned.

If x is -0, +0 is returned.

If x is negative infinity or positive infinity, positive infinity is returned.

ERRORS

No errors occur.

ATTRIBUTES

For an explanation of the terms used in this section, see attributes (7).

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STANDARDS

C11, POSIX.1-2008.

HISTORY

C99, POSIX.1-2001.

The variant returning double also conforms to SVr4, 4.3BSD, C89.

SEE ALSO

abs (3), cabs (3), ceil (3), floor (3), labs (3), rint (3)