mirror of https://github.com/mkerrisk/man-pages
57 lines
1.1 KiB
Groff
57 lines
1.1 KiB
Groff
.\" Copyright 2002 Walter Harms (walter.harms@informatik.uni-oldenburg.de)
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.\"
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.\" %%%LICENSE_START(GPL_NOVERSION_ONELINE)
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.\" Distributed under GPL
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.\" %%%LICENSE_END
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.\"
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.TH CABS 3 2021-03-22 "" "Linux Programmer's Manual"
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.SH NAME
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cabs, cabsf, cabsl \- absolute value of a complex number
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.SH SYNOPSIS
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.nf
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.B #include <complex.h>
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.PP
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.BI "double cabs(double complex " z );
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.BI "float cabsf(float complex " z );
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.BI "long double cabsl(long double complex " z );
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.PP
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Link with \fI\-lm\fP.
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.fi
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.SH DESCRIPTION
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These functions return the absolute value of the complex number
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.IR z .
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The result is a real number.
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.SH VERSIONS
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These functions first appeared in glibc in version 2.1.
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.SH ATTRIBUTES
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For an explanation of the terms used in this section, see
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.BR attributes (7).
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.ad l
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.nh
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.TS
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allbox;
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lbx lb lb
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l l l.
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Interface Attribute Value
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T{
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.BR cabs (),
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.BR cabsf (),
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.BR cabsl ()
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T} Thread safety MT-Safe
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.TE
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.hy
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.ad
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.sp 1
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.SH CONFORMING TO
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C99, POSIX.1-2001, POSIX.1-2008.
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.SH NOTES
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The function is actually an alias for
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.I "hypot(a,\ b)"
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(or, equivalently,
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.IR "sqrt(a*a\ +\ b*b)" ).
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.SH SEE ALSO
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.BR abs (3),
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.BR cimag (3),
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.BR hypot (3),
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.BR complex (7)
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