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Copyright 1989 AT&T
Portions Copyright (c) 1982-2007 AT&T Knowledge Ventures
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let - shell built-in function to evaluate one or more arithmetic expressions

let arg...

let [expr...]

Each arg is a separate arithmetic expression to be evaluated.

let evaluates each expr in the current shell environment as an arithmetic expression using ANSI C syntax. Variables names are shell variables and they are recursively evaluated as arithmetic expressions to get numerical values. let has been made obsolete by the ((...)) syntax of ksh93(1) which does not require quoting of the operators to pass them as command arguments.

ksh returns the following exit values:

0

1

ksh93 returns the following exit values:

0

>0

ksh(1), ksh93(1), set(1), typeset(1), attributes(5)