Dart has two types of optional parameters: named and positional.
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By Params Keyword : You can implement optional parameters by using the params keyword. It allows you to pass any variable number of parameters to a method. But you can use the params keyword for only one parameter and that parameter is the last parameter of the method.
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To indicate optional arguments, Square brackets are commonly used, and can also be used to group parameters that must be specified together. To indicate required arguments, Angled brackets are commonly used, following the same grouping conventions as square brackets.
Read moreHow do you send an optional parameter?
By Params Keyword : You can implement optional parameters by using the params keyword. It allows you to pass any variable number of parameters to a method. But you can use the params keyword for only one parameter and that parameter is the last parameter of the method.
Read moreHow many type of optional parameter are in flutter?
There are three types of optional arguments.19 Şub 2019
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