hoisting-2.js

hoisting(); 

console.log(a); 

var a = "hello hoisting"; 

function hoisting() {
 console.log('hoisted function');
} 

hoisting.js

a = "value" // Assignment before decleration

var a; // Declaration

console.log(a);

reference-error.js

hoisting(); 

console.log(a);  

function hoisting() { 
  console.log('hoisting'); 
} 

reference-errror-2.js

hoisting(); 

console.log(a); 

function hoisting() { 
  console.log('hoisting'); 
}

a = "hoisting";