Object-Oriented JavaScript - Third Edition

Primitive data types recap

Let's quickly summarize some of the main points discussed so far:

• There are five primitive data types in JavaScript:
  • Number
  • String
  • Boolean
  • Undefined
  • Null 

• Everything that is not a primitive data type is an object.

  The primitive number data type can store positive and negative integers or floats, hexadecimal numbers, octal numbers, exponents, and the special numbers-NaN, Infinity, and -Infinity.

• The string data type contains characters in quotes. Template literals allow embedding of expressions inside a string.
• The only values of the Boolean data type are true and false.
• The only value of the null data type is the null value.
• The only value of the undefined data type is the undefined value.
• All values become true when converted to ...