Definition of function functions in JavaScript and declaration of variables < Basics one >

Three ways to construct functions in 1.JavaScript

A.function  createfun () {

}
B. var createfun=function  () {

}
C. var createfun=Newfunction("A", "B", "Return A*b");           

Createfun (10,3);

Three ways to declare variables in 2.JavaScript

A.var foo=value;
B.window.foo=value;
C.foo=value;  // Implicit declarations

The syntax of 3.JavaScript is derived from C, which has no relationship with Java (common sense);

Definition of function functions in JavaScript and declaration of variables < Basics one >