Introduction to Javascript

Data Types

Javascript has 6 primitive data types

• number
• string
• boolean
• undefined
• null
• Symbol

Objects

• Objects can store a collection of data types, which are then called properties.
• Each property has a key and value
  • key is of string data types
  • value can be of any data type.
• If a value is a functon, its called as a method

Equality in Objects

== or === only tests if both operands are same objects.

Arrays

Objects that store values in order.

Functions

Use function keyword to define a function.

• You may provide a name, if not, its called an anonymous function.
• Primatives data types passed in the function are passed by value but Objects are passed by reference.

Functions( Both named or anonymous) can be assigned to a variable.

Source:

• https://www.educative.io/courses/complete-guide-to-modern-javascript/