^ not working as intended

[tskinnar]

Hi, I'm pretty new at this so pardon me if i'm a bit clumsy.

I was in the the Variables and Expansions section in Bash Academy when this exercise came up. Can someone explain why I'm getting the "bad substitution" output?

$ greeting="hello world"
$ echo "$greeting"
hello world
$ echo "${greetingˆ}."
-bash: ${greetingˆ}.: bad substitution
$

Thanks for your help.

[chigh]

What version of bash are you using?

[tskinnar]

$ echo $BASH_VERSION
3.2.57(1)-release

I see. Thanks.