What are the minimal/must steps needed to execute JQuery?

//Step 1: Wait for the DOM of the page to be ready. 

$(document).ready(function () 

{

	//Step 2: Finds the appropriate HTML elements that needs to be acted on by using selector

	var btnObject = $('#btnSayHello'); 

	

	//Step 3: Add event handlers (Here click events)

	btnObject.click(function () 

	{

		alert("Hello World...My First JQuery Program");

	});

});