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.\"#ident "@(#)ccsman:g5/math 1.2"
'\"macro stdmacro
.ie n \{\
.ds pI \fIpi\fP
.ds sR \fIsquare root of\fP\}
.el \{\
.ds pI \(*p
.ds sR \(sr\}
.nr X
.if \nX=0 .ds x} MATH 5 "630 MTG" "\&"
.TH \*(x}
.SH NAME
math \- math functions and constants
.SH SYNOPSIS
.B #include <ccs/math.h>
.SH DESCRIPTION
This file contains declarations of all the functions in the
Math Library (described in Section 3M),
as well as various other functions
that return floating-point values.
.P
It defines the structure and constants used by the
.IR matherr (3M)
error-handling mechanisms, including
the following constant used as an
error-return value:
.P
.TP 20
.SM
HUGE
The maximum value of a single-precision floating-point number.
.P
The following mathematical constants are defined for user convenience:
.P
.TP 20
.SM
M_E
The base of natural logarithms
.RI ( e ).
.TP 20
.SM
M_LOG2E
The base-2 logarithm of
.IR e .
.TP 20
.SM
M_LOG10E
The base-10 logarithm of
.IR e .
.TP 20
.SM
M_LN2
The natural logarithm of 2.
.TP 20
.SM
M_LN10
The natural logarithm of 10.
.TP 20
.SM
M_PI
\*(pI, the ratio of the circumference of a circle to its diameter.
.TP 20
.SM
M_PI_2
\*(pI/2.
.TP 20
.SM
M_PI_4
\*(pI/4.
.TP 20
.SM
M_1_PI
1/\*(pI.
.TP 20
.SM
M_2_PI
2/\*(pI.
.TP 20
.SM
M_2_SQRTPI
.EQ
2 over sqrt pi
.EN
.TP 20
.SM
M_SQRT2
.EQ
sqrt 2
.EN
.TP 20
.SM
M_SQRT1_2
.EQ
sqrt {1 over 2}
.EN
.P
For the definitions of various machine-dependent ``constants,''
see \f2values(5)\f1.
.SH FILES
$DMD/include/ccs/math.h
.SH "SEE ALSO"
matherr(3M),
values(5).
.Ee
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