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.IX Title "Libm 3pm"
.TH Libm 3pm "2018-11-01" "perl v5.28.0" "User Contributed Perl Documentation"
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.SH "NAME"
Math::Libm \- Perl extension for the C math library, libm
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\&  use Math::Libm \*(Aq:all\*(Aq;
\&
\&  print "e = ", M_E, "\en";
\&  print "pi/2 = ", M_PI_2, "\en";
\&  print "erf(1) = ", erf(1), "\en";
\&  print "hypot(3,4) = ", hypot(3,4), "\en";
\&
\&  my $signgam = 0;
\&  my $y = lgamma_r(\-0.5, $signgam);
\&  print "signgam=$signgam lgamma=$y\en";
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
This module is a translation of the C \fImath.h\fR file.
It exports the following selected constants and functions.
.SS "\s-1EXPORT\s0"
.IX Subsection "EXPORT"
None by default.
.SS "Exportable constants"
.IX Subsection "Exportable constants"
.Vb 10
\&  M_1_PI
\&  M_2_PI
\&  M_2_SQRTPI
\&  M_E
\&  M_LN10
\&  M_LN2
\&  M_LOG10E
\&  M_LOG2E
\&  M_PI
\&  M_PI_2
\&  M_PI_4
\&  M_SQRT1_2
\&  M_SQRT2
.Ve
.SS "Exportable functions"
.IX Subsection "Exportable functions"
.Vb 10
\&  double acos(double x)
\&  double acosh(double x)
\&  double asin(double x)
\&  double asinh(double x)
\&  double atan(double x)
\&  double atanh(double x)
\&  double cbrt(double x)
\&  double ceil(double x)
\&  double cosh(double x)
\&  double erf(double x)
\&  double erfc(double x)
\&  double expm1(double x)
\&  double floor(double x)
\&  double hypot(double x, double y)
\&  double j0(double x)
\&  double j1(double x)
\&  double jn(int n, double x)
\&  double lgamma_r(double x, int signgam)
\&  double log10(double x)
\&  double log1p(double x)
\&  double pow(double x, double y)
\&  double rint(double x)
\&  double sinh(double x)
\&  double tan(double x)
\&  double tanh(double x)
\&  double y0(double x)
\&  double y1(double x)
\&  double yn(int n, double x)
.Ve
.SH "AUTHOR"
.IX Header "AUTHOR"
Daniel S. Lewart, <d\-lewart@uiuc.edu>
.SH "SEE ALSO"
.IX Header "SEE ALSO"
perlfunc, Math::Complex, \s-1POSIX\s0.
.SH "BUGS"
.IX Header "BUGS"
Only tested on \s-1AIX 4.2,\s0 FreeBSD 4.0, Linux 2.2.16, and Solaris 2.5.1.
May need some more functions.