String replacement in bash - bad substitution error

Question

I newbie in bash scripting but i don\'t uderstand why it\'s not work

#!/bin/bash
foo=foobarfoobar
echo ${foo//bar/baz}

bad substitution err

Answer 1

$ foo=foobarfoobar
$ echo ${foo}/bar/baz
foobarfoobar/bar/baz

Just that you have the braces in the wrong place, but then I am no expert at BASH, so perhaps this isn't the effect you're going for..