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Re: Bug in expr?

From: Bob Proulx
Subject: Re: Bug in expr?
Date: Fri, 8 Jun 2001 22:00:04 -0600

> I am writing a script and appear completely unable to employ expr.
> It works for plus but for no other operators. I need *.

Are you forgetting that * is a shell metacharacter and would need to
be protected from shell expansion?  Check this with echo.

  echo expr 2 * 3

You want to quote the * by any of the shell quoting methods.

  echo expr 2 '*' 3
  echo expr 2 "*" 3
  echo expr 2 \* 3

The same goes for other shell metacharacters as well.  Check out the
man page or info page on your shell.  'info bash'

Hope that helps


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