Can parameters be optional?

It turns out that Dart does indeed have a way to ask if an optional parameter was provided when the method was called. Just use the question mark parameter syntax .

It turns out that Dart does indeed have a way to ask if an optional parameter was provided when the method was called. Just use the question mark parameter syntax .

Unlike positional parameters, the parameters’ name must be specified while the value is being passed . Curly brace {} can be used to specify optional named parameters.

Unlike positional parameters, the parameters’ name must be specified while the value is being passed . Curly brace {} can be used to specify optional named parameters.

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 .