JAVASCRIPT

Create Function in javascript

function world(params){
 	//Code to be executed when the function is called. 
}
world()

//Explaination
//'world' in the function is the name of the function.
//There are brackets after function name. Those are use to push parameters
//The forth line Calls the function named 'world'

new function in javascript

// NOTE : Function defined using (Function CONSTRUCTOR) does not 
//        inherits any scope other than the GLOBAL SCOPE
 
var x=7;
function A(){
  var x=70;
   function B(){
     console.log(x);                // 70
   }
     let C = function(){
      console.log(x);              // 70
     }
	 		let D = new Function('console.log(x)'); // user caps F

	B();  // 70
    C(); // 70
    D();// 7 - Inherits always the GLOBAL scope
};

A();

new function javascript

var add = function(num1, num2) {
  return num1 + num2
}

js new function

When a function is called with the new keyword, the function will be used as a constructor.