1.\" $NetBSD: creal.3,v 1.5 2017/09/27 09:20:27 maya Exp $ 2.\" Copyright (c) 2001-2003 The Open Group, All Rights Reserved 3.Dd September 27, 2017 4.Dt CREAL 3 5.Os 6.Sh NAME 7.Nm creal , 8.Nm crealf , 9.Nm creall 10.Nd complex real functions 11.Sh SYNOPSIS 12.In complex.h 13.Ft double 14.Fn creal "double complex z" 15.Ft float 16.Fn crealf "float complex z" 17.Ft long double 18.Fn creall "long double complex z" 19.In tgmath.h 20.Ft complex-float 21.Fn creal "complex-float z" 22.Sh DESCRIPTION 23These functions compute the real part of 24.Ar z . 25.Sh RETURN VALUES 26These functions return the real part value. 27.Sh ERRORS 28No errors are defined. 29.Sh APPLICATION USAGE 30For a variable 31.Ar z 32of type 33.Vt complex : 34.Bd -literal -offset indent 35z == creal(z) + cimag(z)*I 36.Ed 37.Sh SEE ALSO 38.Xr carg 3 , 39.Xr cimag 3 , 40.Xr conj 3 , 41.Xr cproj 3 , 42.St -p1003.1-2001 43.Aq Pa complex.h 44.Sh COPYRIGHT 45Portions of this text are reprinted and reproduced in electronic form 46from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology 47-- Portable Operating System Interface (POSIX), The Open Group Base 48Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of 49Electrical and Electronics Engineers, Inc and The Open Group. 50In the 51event of any discrepancy between this version and the original IEEE and 52The Open Group Standard, the original IEEE and The Open Group Standard 53is the referee document. 54The original Standard can be obtained online at 55http://www.opengroup.org/unix/online.html . 56