By definition, an Optional Parameter is a handy feature that enables programmers to pass less number of parameters to a function and assign a default value .
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To specify the optional argument with default values, we use {} curly braces . In optional positional argument and optional named argument, if we don’t specify the value in an argument then it is set to NULL.
Read moreHow do you pass optional parameters in flutter?
To specify the optional argument with default values, we use {} curly braces . In optional positional argument and optional named argument, if we don’t specify the value in an argument then it is set to NULL.
Read moreWhat is the use of constructor in Flutter?
Constructor is a special method of Dart class which is automatically called when the object is created. The constructor is like a function with/without parameter but it doesn’t have a return type. Now you can create new object using a constructor.16 Mar 2022
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Dart Constructors A constructor is a special function of the class that is responsible for initializing the variables of the class . Dart defines a constructor with the same name as that of the class.
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Constructors in Dart: The constructors have the same name as the class name and don’t have any return type. In the above syntax: class_name is the name of the class whose constructor is being created. parameters are optional features and they can and can’t be defined for the constructor.20 Tem 2020
Read moreHow do you write a Dart constructor?
It is option to declare within the class. All class have own constructor but if we don’t declare or forget then Dart compiler will create default constructor automatically by passing the default value to the member variable.
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