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Old 03-21-2009
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cfajohnson cfajohnson is offline Forum Advisor  
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Join Date: Mar 2007
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Quote:
Originally Posted by dharol View Post
I know there are many similar questions but have not been able to find a syntax in the posts that work.

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Quote:
I calculate var1 and var2 in a previous portion of the script. Then i want to set var3 to var2-var1.
Have tried all kinds of variations on:

var3 = `"expr $var2 - $var1`


Code:
@ var3 = $var2 - $var1

In a real scripting shell, use:


Code:
var3=$(( $var2 - $var1 ))