Javascript - Functions - Default Values

Javascript allows default parameter values

function func(apple="Apple") {return apple;}

Default parameters can be more complex, for example, a function can be call when a value is not given and the returned value will become the variable.

function func(apple=apples())

Things to keep in mind:

• Arguments are passed by value, objects are passed by reference. Similar to Python.
• Functions may access outer variables
• Functions that don't return anything return undefined