From b3fa76c1beac9719d97917361a9d7fde2d678300 Mon Sep 17 00:00:00 2001 From: axel Date: Wed, 13 Dec 2006 03:10:37 +1000 Subject: [PATCH] Extend documentation for the math function darcs-hash:20061212171037-ac50b-1b9d0f51b284925fe0fc3020774ec32bb1414ce7.gz --- doc_src/math.txt | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/doc_src/math.txt b/doc_src/math.txt index a29a3a834..b58527f97 100644 --- a/doc_src/math.txt +++ b/doc_src/math.txt @@ -8,8 +8,13 @@ math is used to perform mathematical calcualtions. It is only a very thin wrapper for the bc program, that makes it possible to specify an -expression from the commandline without using non-standard extensions +expression from the command line without using non-standard extensions or a pipeline. Simply use a command like math 1+1. For a description of the syntax supported by math, see the manual for -the bc program. +the bc program. Keep in mind that parameter expansion takes place on +any expressions before they are evaluated. This can be very useful in +order to perform calculations involving environment variables or the +output of command substitutions, but it also means that parenthesis +have to be escaped. +