.\" Copyright (c) 2006 Apple Computer .\" .Dd October 10, 2006 .Dt CONJ 3 .Os BSD 4 .Sh NAME .Nm conj .Nd complex conjugation function .Sh SYNOPSIS .Fd #include <complex.h> .Ft double complex .Fn conj "double complex z" .Ft long double complex .Fn conjl "long double complex z" .Ft float complex .Fn conjf "float complex z" .Sh DESCRIPTION .Fn conj "z" computes the complex conjugate of a complex floating-point number .Fa z . .Pp If .Fa z = x+iy, then .Fn conj "z" = x-iy. .Sh NOTES If y is NaN, conj(x+yi) = x-yi; the sign bit of the NaN has been changed. .Sh SEE ALSO .Xr complex 3 .Sh STANDARDS The .Fn conj function conforms to ISO/IEC 9899:1999(E).