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.\"
.\" cook - file construction tool
.\" Copyright (C) 1998 Peter Miller;
.\" All rights reserved.
.\"
.\" This program is free software; you can redistribute it and/or modify
.\" it under the terms of the GNU General Public License as published by
.\" the Free Software Foundation; either version 2 of the License, or
.\" (at your option) any later version.
.\"
.\" This program is distributed in the hope that it will be useful,
.\" but WITHOUT ANY WARRANTY; without even the implied warranty of
.\" MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
.\" GNU General Public License for more details.
.\"
.\" You should have received a copy of the GNU General Public License
.\" along with this program; if not, write to the Free Software
.\" Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
.\"
.\" MANIFEST: User Guide, Built-In Functions, Expr
.\"
.H 2 "expr"
This function may be used to calculate simple integer arithmetic expressions.
The numbers and the operators are expected to each be a separate argument.
The result is a string containing the value of the evaluated expression.
.H 3 "Operators"
The following operators are understood.
They have the same precedence as the equivalent C operators.
.TS
center,tab(;);
c c
lf(CW) c.
Operator;Associativity
_
( );\(->
! ~ -;\(<-
* / %;\(->
+ -;\(->
<< >>;\(->
< <= > >=;\(->
== !=;\(->
&;\(->
^;\(->
|;\(->
&&;\(->
||;\(->
?:;\(<-
.TE
Please note that there is no short-circuit evaluation of
the \f(CW?:\fP or \f(CW&&\fP or \f(CW||\fP operators.
.P
You may need to quote some of the operators, to insulate them from their
usual Cook interpretation (colon and equals characters in particular).
.P
Numbers may be given in decimal,
octal (with a \f(CW0\fP prefix), or
hexadecimal (with a \f(CW0x\fP prefix).
The result is always decimal.
.H 3 "See Also"
count
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