JavaScript hoisting function vs function variable

Question

Here is my javascript code :

    console.log(a);
    c();
    b();            
    var a = \'Hello World\';
    var b = function(){
        console.log(\"B is ca         


        

Answer 1

A Function Declaration will be hoisted along with its body.

A Function Expression not, only the var statement will be hoisted.

---

This is how your code "looks" like to the interpreter after compiletime - before runtime:

 var c = function c(){
      console.log("C is called");
 }

 var a = undefined
 var b = undefined

 console.log(a); // undefined at this point
 c(); // can be called since it has been hoisted completely
 b(); // undefined at this point (error)

 a = 'Hello World';
 b = function(){
     console.log("B is called");
 }

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