Shell script variable replacing characters

Question

I have a variable var="abcde$$$$$$$$fff$$gg". I want to replace all $ with space ' ' but the following puts just one space

var=$( echo "$var" | tr '$' ' ')

How can i replace them all?

Answer 1

you can replace without calling external commands (using bash)

$ var='abcde$$$$$$$$fff$$gg'
$ echo "${var//$/ }"
abcde        fff  gg

Note that you should use single quotes so that the "$" sign does not get interpolated