by Sai gowtham

How to lowercase all letters of a string in Bash

In this tutorial, we will learn how to lowercase all letters of a string in Bash.

Lowercase the string

To lowercase the string, we can use the double commas ,, in Bash.

Here is an example, that converts the UPPERCASE string 'BMW' to lowercase:

car='BMW'
lowercase=${car,,}

echo $lowercase

Output:

"bmw"

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