Related methods of specifying function names in JavaScript_Basic knowledge

JavaScript 1.2 introduces the concept of function literals as a new way to define more than one function.

A function literal is an expression that defines an unnamed function.
Grammar

The syntax of a literal function is very similar to a function declaration, except that it is used as an expression, not as a declaration, and the function name is required.

<script type="text/javascript">
<!--
var variablename = function(Argument List){
            Function Body 
          };
//-->
</script>

Syntactically, you can create a literal function by specifying the function name:

<script type="text/javascript">
<!--
var variablename = function FunctionName(Argument List){ 
           Function Body 
          };
//-->
</script>

However, the name means nothing, so it's not worth using it.
Example:

Here is an example of creating such a function:

<script type="text/javascript">
<!--
var func = function(x,y){ return x*y };
//-->
</script>

You can call the following function in the above function:

<script type="text/javascript">
<!--
func(10,20); // This will produce 200
//-->
</script>