JavaScript Variable Naming

/*
//the first character is letter
var myName = "I am Thet Naing Win.";
document.write(myName);

//the first character is underscore
var _myAge = "I am 35 now.";
document.write(_myAge); 

//the first character is number. this is not valid naming.
var 1_myAge = "I am 35 now.";
document.write(1_myAge);

var myName1 = "I am Thet Naing Win.";
var myAge1 = "I am 35 now.";
document.write(myName1);
document.write(myAge1);


//we can not use punctuation marks
var myName, = "I am Thet Naing Win.";
document.write(myName,);

var _myAge = "I am 35 now.";
document.write(_myAge);

//proper variable name
var myNmae = "I am Thet Naing Win.";
document.write(myNmae);

//we can use very long variable name. but this is improper variable name
//so we should care in variable naming
var iamthetnaing = "I am Thet Naing Win.";
document.write(iamthetnaing); 

var while = "I am Thet Naing Win.";
document.write(while); */

To see video in YouTube.