.\" Copyright 2002 Walter Harms (walter.harms@informatik.uni-oldenburg.de)
.\" Distributed under GPL
.\"
.TH CEXP 3 2008-08-11 "" "Linux Programmer's Manual"
.SH NAME
cexp, cexpf, cexpl \- complex exponential function
.SH SYNOPSIS
.B #include <complex.h>
.sp
.BI "double complex cexp(double complex " z ");"
.br
.BI "float complex cexpf(float complex " z ");"
.br
.BI "long double complex cexpl(long double complex " z ");"
.sp
Link with \fI\-lm\fP.
.SH DESCRIPTION
The function calculates e (2.71828..., the base of natural logarithms)
raised to the power of
.IR z .
.LP
One has:
.nf

    cexp(I * z) = ccos(z) + I * csin(z)
.fi
.SH VERSIONS
These functions first appeared in glibc in version 2.1.
.SH "CONFORMING TO"
C99.
.SH "SEE ALSO"
.BR cabs (3),
.BR clog (3),
.BR cpow (3),
.BR complex (7)