Dart has two types of optional parameters: named and positional. Before I discuss the differences, let me first discuss the similarities. Dart’s optional parameters are optional in that the caller isn’t required to specify a value for the parameter when calling the function. Optional parameters can only be declared after any required parameters. Optional parameters … Read more
There are two related concepts, both called “keyword arguments“. On the calling side, which is what other commenters have mentioned, you have the ability to specify some function arguments by name. You have to mention them after all of the arguments without names (positional arguments), and there must be default values for any parameters which … Read more
ES2015 and later In ES2015, parameter destructuring can be used to simulate named parameters. It would require the caller to pass an object, but you can avoid all of the checks inside the function if you also use default parameters: myFunction({ param1 : 70, param2 : 175}); function myFunction({param1, param2}={}){ // …function body… } // … Read more