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.\" Copyright 1993 David Metcalfe (david@prism.demon.co.uk)
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.\"
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.\" Permission is granted to make and distribute verbatim copies of this
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.\" manual provided the copyright notice and this permission notice are
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.\" preserved on all copies.
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.\"
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.\" Permission is granted to copy and distribute modified versions of this
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.\" manual under the conditions for verbatim copying, provided that the
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.\" entire resulting derived work is distributed under the terms of a
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.\" permission notice identical to this one.
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.\"
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.\" Since the Linux kernel and libraries are constantly changing, this
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.\" manual page may be incorrect or out-of-date. The author(s) assume no
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.\" responsibility for errors or omissions, or for damages resulting from
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.\" the use of the information contained herein. The author(s) may not
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.\" have taken the same level of care in the production of this manual,
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.\" which is licensed free of charge, as they might when working
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.\" professionally.
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.\"
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.\" Formatted or processed versions of this manual, if unaccompanied by
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.\" the source, must acknowledge the copyright and authors of this work.
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.\"
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.\" References consulted:
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.\" Linux libc source code
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.\" Lewine's _POSIX Programmer's Guide_ (O'Reilly & Associates, 1991)
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.\" 386BSD man pages
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.\" Modified Sat Jul 24 19:42:04 1993 by Rik Faith (faith@cs.unc.edu)
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.\" Added fabsl, fabsf, aeb, 2001-06-07
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.\"
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.TH FABS 3 2001-06-07 "" "Linux Programmer's Manual"
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.SH NAME
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fabs, fabsf, fabsl \- absolute value of floating-point number
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.SH SYNOPSIS
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.nf
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.B #include <math.h>
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.sp
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.BI "double fabs(double " x );
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.br
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.BI "float fabsf(float " x );
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.br
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.BI "long double fabsl(long double " x );
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.fi
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.sp
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Link with \-lm.
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.SH DESCRIPTION
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The \fBfabs\fP() functions return the absolute value of the floating-point
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number \fIx\fP.
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.SH ERRORS
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No errors can occur.
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.SH "CONFORMING TO"
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The
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.BR fabs ()
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function conforms to SVr4, POSIX.1-2001, 4.3BSD, C89.
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The other functions are from C99.
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.SH "SEE ALSO"
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.BR abs (3),
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.BR ceil (3),
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.BR cabs (3),
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.BR floor (3),
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.BR labs (3),
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.BR rint (3)
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