Convert string to variable case

Question

Using bash version 3.2.57 (1) -release (x86_64-apple-darwin14)

How can I “assign” or “change” an existing value read in a variable.

If the user enters a string IAmString, I would like to propInputsave the value IAmString. I just print to the console, for example, for the sake of.

read userInput
echo ${userInput} | tr '[:upper:]' '[:lower:]'

Answer 1

You must save your echo output:

read userInput
userInput=$(echo "$userInput" | tr '[:upper:]' '[:lower:]')

Answer 2

I am surprised that it still does not work ...

Having trouble saving the value?

If so, you need to:

userInput=$(echo ${userInput} | tr '[:upper:]' '[:lower:]')

But it looks like a mac environment. What results do you get?

Change, add userInput=$()and change it to find out better.