Dart named constructor

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 .

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 .

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.

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.