Question

what is undo,define in short ​

Answer 1

Answer:

Undo is a function performed to reverse the action of an earlier action. For example, the undofunction can undo deleted text in a word processor.

Answer 2

Answer:

Undo is an interaction technique which is implemented in many computer programs. It erases the last change done to the document, reverting it to an older state. In some more advanced programs, such as graphic processing, undo will negate the last command done to the file being edited.

Explanation:

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