Solaris

#!/bin/ksh

VAR_ONE=HELLO

TEMP=ONE

echo $VAR_${TEMP}

## Output is: ONE

Hi, I want the output to echo HELLO and not ONE as the above script does. I know I am missing something with dollar substitution. Can anyone help me out ?
Thanks.
Cal

eval echo \$VAR_$TEMP

This 3-word expression goes thru the last word twice- the first iteration by eval which evaluates the expression followin it- where it expands the var $TEMP to 'ONE', and also unescapes the first backslash.

This leaves 'echo $VAR_ONE'. echo does its job, and you get:
hello.

cheers, hope this helps.

EDIT: Didnt test this in ksh now, but I think this is how I did it at work...

Thanks this solution works but I want to assign the output to a variable.... its not working. I tried both

Q=eval echo \$VAR_$TEMP
Q=`eval echo \$VAR_$TEMP`

echo $Q doesnt give same output as eval echo \$VAR_$TEMP

hmm it works for me, but then I never use backticks (unless Im in vanilla bourne shell). With backticks the output I get is 'ONE'. I use the dollar-parens syntax since you can nest it and its easier to read and debug.

Code:

$ VAR_ONE=hello
$ TEMP=ONE
$ eval echo \$VAR_$TEMP
hello
$ f=$(eval echo \$VAR_$TEMP)
$ echo $f
hello

Thanks, it works. Appreciate all the responces.