What is assert for?

The assert keyword is used when debugging code . The assert keyword lets you test if a condition in your code returns True, if not, the program will raise an AssertionError. You can write a message to be written if the code returns False, check the example below.

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What does Extends do in flutter?

You can inherit from or extend a class using the extends keyword. This allows you share properties and methods between classes that are similar, but not exactly the same . Also, it allows different subtypes to share a common runtime type so that static analysis doesn’t fail.

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