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Full Discussion: formating number strings
Top Forums UNIX for Dummies Questions & Answers formating number strings Post 49062 by Perderabo on Wednesday 24th of March 2004 12:26:26 PM
Old 03-24-2004
Since you were using expr, I assumed that you were using sh which cannot do arithmetic. ksh is a great shell, but you're not using all of its features yet.

With ksh you can do:

((percent = 100 * used / avail))

which will work the same as

((percent = 100 * $used / $avail))

if "avail" and "used" both contain simple numbers.
 

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LEARN ABOUT MINIX

let

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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