[lug] Letting Bash do the Arithmetic

[Sean Reifschneider]

On Mon, Apr 14, 2003 at 06:28:22PM -0600, Peter Hutnick wrote:
>So I'm trying stuff like "head -n ((23945837-4926402)) some.file"  and
>getting "bash: syntax error near unexpected token `('."

I usually use:

   guin:jafo$ echo head -n $[23945837-4926402] some.file
   head -n 19019435 some.file

though I've also been known to do:

   guin:jafo$ let lines=23945837-4926402
   guin:jafo$ echo head -n $lines some.file
   head -n 19019435 some.file

Sean
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