The primitive data types
· Number
· String
· Boolean
Terms to know...
· integer
· floating-point value
· exponent
· empty string
· escape sequence
· Boolean value
Rules for creating identifiers in JavaScript
· Identifiers can only contain letters, numbers, the underscore, and the $.
· Identifiers can’t start with a number.
· Identifiers are case-sensitive.
· Identifiers can be any length.
· Identifiers can’t be the same as reserved words.