Re: shell script output

[Cameron Simpson <cs@xxxxxxxxxx>]

On 24Nov2006 14:44, Kaushal Shriyan <kaushalshriyan@xxxxxxxxx> wrote:
| Below is my script
| 
| ##########################################
| #!/bin/bash
| 
| v1=20
| v2=30
| v3=40
| 
| i=1
| 
| for i in 1 2 3
| do
| echo  $'v'$i''
| done
| 
| ##########################################
| 
| I want to print the values of v1,v2 and v3

Ok, so the command you want to issue, for $i == 2, is:

  echo $v2

So construct that string:

  shcmd="echo \$v$i"
or
  shcmd='echo $v'$i

The result of that is that the variable "$shcmd" contains the string:

  echo $v2

Then "eval" that command (which takes a string and runs it as a shell
command):

  eval "$shcmd"

So your loop would look like this:

  for i in 1 2 3
  do
    shcmd="echo \$v$i"
    eval "$shcmd"
  done

Cheers,
-- 
Cameron Simpson <cs@xxxxxxxxxx> DoD#743
http://www.cskk.ezoshosting.com/cs/

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