In the Dart language, what is the function of the "as" keyword?

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The "as" keyword in the Dart language is used for typecasting. It allows you to cast an object to a specific type that you specify. For example, if you have an object of type Animal and want to cast it to type Dog, you can use the "as" keyword to do so:

Animal animal = new Animal();
Dog dog = animal as Dog;

This will cast the "animal" object to type Dog and assign it to the "dog" variable. If the object cannot be cast to the specified type, a runtime error will occur.