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In the Dart programming language, a constructor is a special method that is called when an object of a class is created. Constructors are used to initialize the object's instance variables and perform any other setup that is required before the object is used.
There are several types of constructors in Dart, including default constructors, named constructors, and parameterized constructors.
A default constructor is a constructor that takes no arguments and does not have a name. It is automatically provided by the compiler if you do not define any constructors for your class.
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