What are variables in Flutter?

The basic building block of information in your Dart program will be variables. Anytime you’re working with data in an app, you can store that data in variables. For example, if you’re building a chat application, you can use variables to refer to chat messages or a user. Variables store references to these values.

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What is Dart null safety?

The Dart language now supports sound null safety! When you opt into null safety, types in your code are non-nullable by default, meaning that variables can’t contain null unless you say they can . With null safety, your runtime null-dereference errors turn into edit-time analysis errors.

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Is Dart a keyword?

Dart Keywords are the reserve words that have special meaning for the compiler . It cannot be used as the variable name, class name, or function name. Keywords are case sensitive; they must be written as they are defined.

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