Escape characters

\n \" \'

document.write("<h1 class=\"special\">Important Headeline</h1>");

var htmlSnippet = "<h1 class=\"special\">Important Headeline</h1>";
document.write(htmlSnippet);

Length

fullName.length;
"Welcome to Treehouse".length;

fullName is an object
length is a property

Letter Casing

String.prototype.toLowerCase();
toLowerCase() is a method

fullName.toLowerCase();
fullName.toUpperCase();

Concatenation

message = message + "Welcome to Treehouse.";
message += "Welcome to Treehouse.";
var fullName = firstName + " " + lastName;

[make-shout.js]

var stringToShout = prompt("What should I shout?");
var shout = stringToShout.toUpperCase();
shout += "!!!";
alert(shout);