In Haxe, functions follow a similar structure to conditional statements and variables. They have a name, a set of zero or more arguments, and code within open and closed curly brackets.
Like variables, functions also have a type.
The type of a function is its return type. This is the type of the value that will be returned from the function. It follows the name and arguments with a colon and then the type.
A function is defined through using the function keyword. The name of the function follows the keyword.
Haxe uses the terminology of arguments for passing data into a function. These, like other variables, must have a type that defines them. They are within open and closed parentheses.
Haxe support optional arguments. In programming terminology, these are values defined within the parentheses with initial values. If a value is not passed into the function (thus making it optional), the variable takes this value.
Private Function, Public Method
As discussed in the section on Objects, a function is private. If the public keyword is used with a function, it becomes a method of an object.