Java Reference
In-Depth Information
Defining a Function
There are three ways to define a function.
Function Declarations
To define a function literal we can use a function declaration:
function hello(){
alert("Hello World!");
This starts with the function keyword and is followed by the name of the function, which
in this case is called ' hello ', followed by parentheses. After this is a block that contains the
code for the function.
This is known as a named function as the function has a name: ' hello '.
Function Expressions
Another way of defining a function literal is to create a function expression . This assigns
an anonymous function to a variable:
var goodbye = function(){
alert("Goodbye World!");
The function in this example is known as an anonymous function because it does not have
a name; it is simply created, then assigned to the variable goodbye . Alternatively we can
create a named function expression instead:
var goodbye = function bye(){
alert("Goodbye World!");
The name of this function is bye , and it has been assigned to the variable goodbye .
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