SYNTAX

COMMENTS

// a one line comment

/* this is a longer, 
 * multi-line comment
 */

/* You can't, however, /* nest comments */ SyntaxError */

VARIABLES AND PRIMITIVES

DECLARATIONS

var a = 2;

let a = 2;

const a = 2;

GLOBAL vs. scope

DATA TYPES

• undefined
• null
• Boolean
• Number
• String
• Symbol

• Object

EXPRESSIONS AND OPERATORS

OPERATORS

• Assignment
• Comparison
• Arithmetic
• Bitwise
• Logical

• String
• Conditional (ternary)
• Comma
• Unary
• Relational