if test for higher value between 2 decimal numbers Post: 302543004

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Top Forums Shell Programming and Scripting if test for higher value between 2 decimal numbers Post 302543004 by emjs on Friday 29th of July 2011 07:36:28 AM

07-29-2011

Registered User

if test for higher value between 2 decimal numbers

Hi
I would like to test for a max number value. It may be a decimal so I know I have to pipe into bc.
I just cannot get the syntax for this to work. I cannot get passed an error with the bracket - see below.
Any help appreciated.
Regards
Ewan

This works:

Code:

[ewan@sbc-san-01]/export/home/ewan> cat xx.ksh
#!/bin/sh
uname -a

max=6
val=3
if [ $max -gt $val ]
  then
    echo MAX $max VAL $val
  fi

Output:
=======

Code:

[ewan@sbc-san-01]/export/home/ewan> ./xx.ksh   
SunOS sbc-san-01 5.10 Generic_144488-12 sun4v sparc SUNW,SPARC-Enterprise-T5220
MAX 6 VAL 3

This fails:

Code:

[ewan@sbc-san-01]/export/home/ewan> cat ./xx.ksh
#!/bin/sh
uname -a

max=6
val=3
#if [ $max -gt $val ]
if [ $(echo "$max -gt $val" |bc) -eq 1 ]
  then
    echo MAX $max VAL $val
  fi

Output:
=======

Code:

[ewan@sbc-san-01]/export/home/ewan> ./xx.ksh    
SunOS sbc-san-01 5.10 Generic_144488-12 sun4v sparc SUNW,SPARC-Enterprise-T5220
./xx.ksh: syntax error at line 7: `(' unexpected

Last edited by pludi; 07-29-2011 at 08:52 AM..

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