How do I return backward with a return button?

How to return backward by one step with a return button after pressed wrong number button when creating a calculator apps ? For example, wrong pressing 1234 by 1237. Thanks !

Welcome to the community. Try this


Hi Dora, i just try it, it's ok, thank you very much! :+1: :+1: :+1: :+1 :blush:

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