How to use function () in js _ javascript tips-js tutorial

Through the properties of function objects, you can easily assign a function to a variable or pass the function as a parameter, the following describes how to use the syntax javascript function of a function. Different from other languages, each function is maintained and run as an object. Through the properties of function objects, you can easily assign a function to a variable or pass the function as a parameter. Before proceeding, let's take a look at the usage syntax of the function:

The following is a reference clip:
Function func1 (...) {...}
Var func2 = function (...) {...};
Var func3 = function func4 (...) {...};
Var func5 = new Function ();

The Code is as follows: