Convert string in variable lower case

Question

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

How can I 're-assign' or 'change' the existing value read into a variable.

If the user inputs the string IAmString, I'd like propInput to store the value iamstring. I'm simply printing to the console just for example sake.

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

Aaron · Accepted Answer · 2018-11-19T13:05:12.607

13

You should store the output of your commands :

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

edited Nov 19 '18 at 13:05

answered Jan 16 '16 at 11:13

Aaron

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you're right. he was indeed missing the part where he sets the variable. for some reason, i thought he didn't need that part and had issues converting to lowercase... – yftse Jan 16 '16 at 11:17

score -1 · Answer 2 · edited Jan 17 '16 at 02:34

-1

Ii'm surprised that doesn't already work...

Did you have trouble storing the value?

If so, you'd have to:

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

But it looks like a mac environment. What results are you getting?

Edit, added userInput=$() and restructured to better inquire.

edited Jan 17 '16 at 02:34

Alfred Huang

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answered Jan 16 '16 at 11:15

yftse

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No, it works. But he doesn't want to have it in console. He wants to store the new string in `userInput`. – ROMANIA_engineer Jan 16 '16 at 11:16
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This is not an answer but a comment. – Oleg Andriyanov Jan 16 '16 at 11:16
it wasn't an answer, because i wasn't quite sure about the question. but i GUESS i see the question now? i still only now GUESS... that this was missing `userInput=$()`. Editing my "comment" now... – yftse Jan 16 '16 at 11:20

Convert string in variable lower case

2 Answers2