👉 Undo is a verb that means to reverse or correct an action. It's often used in computer programming, where it's used to undo changes made by another program. For example, if you want to change something in your code but don't want to make any changes, you might use the command `undo()`. For instance: ```python # Before: my_code my_code = "Hello, world!" # After: my_code my_code = "Hello, world!" print
