quick variable question in a shell script

yargk · 02-23-2010, 01:51 PM

I'd like to use a variable as an index to call another variable

z24=".75"

x="24"

printf $"z$x"

I know the last line is wrong. I'd like it to print .75. How do I do this? Thanks.

evo2 · 02-23-2010, 01:57 PM

You are looking for arrays. Assuming you are using bash:

Code:

z[24]=".75"
x=24
echo ${z[$x]}

Evo2.

GrapefruiTgirl · 02-23-2010, 01:57 PM

Code:

eval echo \$z${x}

`eval` evaluates all arguments on the cmdline, and then executes the result as one unified statement.

Check `man eval` for more details

Sasha

HasC · 02-23-2010, 01:59 PM

This:

Code:

$ echo $z$(echo $x)

but what an ugly hack, I must say :-S

GrapefruiTgirl · 02-23-2010, 02:09 PM

HasC -- have you tested that? It doesn't work for me..

Sasha