12 // The number twelve
1.2 // The number one point two
"hello world" // A string of text
'Hi' // Another string
true // A Boolean value
false // The other Boolean value
/javascript/gi // A "regular expression" literal (for pattern matching)
null // Absence of an object
{ x:1, y:2 } // An object initializer
[1,2,3,4,5] // An array initializer