JavsScript Data Types - tdkehoe/blog GitHub Wiki

JavaScript has five primitive data types:

• number: JavaScript has only one number type, for integers, floating point numbers, etc.
• string: for text, or numbers interpreted as text.
• boolean: true or false.
• null: no value.
• undefined: unspecified data type.
• symbol: a new data type whose instances are unique and immutable.

#Converting Values Between Data Types

JavaScript is a dynamically typed language. This means that JavaScript will usually convert a value from one data type to another without the programmer having to specify anything. To explicitly convert between data types:

• parseInt('380px') returns the number 380.
• parseFloat('pi is 3.141592653589793') returns 3.141592653589793.

You can specify the number system with a radix parameter.

toString() converts a value into a string.