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OpenSolaris 2009.06 - man page for let (opensolaris section 1)

let(1)					  User Commands 				   let(1)

NAME
       let - shell built-in function to evaluate one or more arithmetic expressions

SYNOPSIS
   ksh
       let arg...

   ksh93
       let [expr...]

DESCRIPTION
   ksh
       Each arg is a separate arithmetic expression to be evaluated.

   ksh93
       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.

EXIT STATUS
   ksh
       ksh returns the following exit values:

       0    The value of the last expression is non-zero.

       1    The value of the last expression is zero.

   ksh93
       ksh93 returns the following exit values:

       0     The last expr evaluates to a non-zero value.

       >0    The last expr evaluates to 0 or an error occurred.

ATTRIBUTES
       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWcsu			   |
       +-----------------------------+-----------------------------+

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

SunOS 5.11				    2 Nov 2007					   let(1)


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