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Top Forums Shell Programming and Scripting Get variables from expression Post 302901555 by zulfi123786 on Wednesday 14th of May 2014 10:00:53 AM
Old 05-14-2014
Thank you for your replies

Below is a sample Expression

Code:
 
UsrAppNO=(UsrCustGBLNo*2) + UsrCustRegNo + 99

Actually there is a common global code over which regional customizations happen. In the above expression UsrCustGBLNo is set at global level and UsrCustRegNo at regional level and before I evaluate the expression I have to ensure all variables are set

To add to complexity some expressions are passed as arguments to few scripts so I am forced to look at a generic solution by parsing the input expression and get the variables and check if they hold a value.

The expressions contain relational,logical and arithmetic operators and constants

Thanks
Zulfi

Last edited by zulfi123786; 05-14-2014 at 11:06 AM..
 

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let(1)                                                             User Commands                                                            let(1)

NAME
let - shell built-in function to evaluate one or more arithmetic expressions SYNOPSIS
ksh let arg... DESCRIPTION
ksh Each arg is a separate "arithmetic expression" to be evaluated. EXIT STATUS
The following exit values are returned: 0 The value of the last expression is non-zero. 1 The value of the last expression is zero. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWcsu | +-----------------------------+-----------------------------+ SEE ALSO
ksh(1), set(1), typeset(1), attributes(5) SunOS 5.10 15 Apr 1994 let(1)
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