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Full Discussion: need help using one variable multiple times
Top Forums Shell Programming and Scripting need help using one variable multiple times Post 302575645 by m.d.ludwig on Tuesday 22nd of November 2011 09:07:00 AM
Old 11-22-2011
Use:
Code:
while [[ 0 -lt $VarPizza ]]
do
  read -p "What toppings would you like" Toppings
   (( VarPizza = $VarPizza - 1 ))
done

(Indenting inside of loops is highly recommended)

Also, for validating the input, you can save a call to grep with:
Code:
until [[ "$VarPizza" = [1-9]+([0-9]) ]]

This also prevents someone from entering "0" for the number of pizzas.
 

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LEARN ABOUT BSD

zgrep

ZGREP(1)						      General Commands Manual							  ZGREP(1)

NAME

       zgrep - search possibly compressed files for a regular expression

SYNOPSIS

       zgrep [ grep_options ] [ -e ] pattern filename...

DESCRIPTION

       Zgrep  invokes  grep  on  compressed  or  gzipped  files.   These  grep	options  will  cause  zgrep  to  terminate  with  an  error  code:
       (-[drRzZ]|--di*|--exc*|--inc*|--rec*|--nu*).  All other options specified are passed directly to grep.  If no file is specified,  then  the
       standard input is decompressed if necessary and fed to grep.  Otherwise the given files are uncompressed if necessary and fed to grep.

       If the GREP environment variable is set, zgrep uses it as the grep program to be invoked.

EXIT CODE

       2 - An option that is not supported was specified.

AUTHOR

       Charles Levert (charles@comm.polymtl.ca)

SEE ALSO

       grep(1), gzexe(1), gzip(1), zdiff(1), zforce(1), zmore(1), znew(1)

																	  ZGREP(1)
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