JavaScript Data Types
  Duration: 7:54
Part of Course: Introductory D3 Course
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Takeaways:

  • JavaScript has three data types - primary data types, composite data types, and special data types
  • Primary Data Types are data types that store primitive values
  • Composite Data Types are data types that reference addresses which store variables
  • Special Data Types are data types that have special uses and cases
  • Primary Data Type examples include strings, numbers, and booleans
  • Composite Data Type examples include Objects and Arrays
  • JavaScript Arrays are a special kind of JavaScript Object
  • JavaScript Arrays have a length property while JavaScript objects do not
  • JavaScript Arrays allow for value selection through passing an index number
  • Special Data Type examples include null and undefined
  • JavaScript null reflects a lack of value
  • JavaScript undefined reflects a lack of type and value
  • JSON, which stands for JavaScript Object Notation, is a text-based open standard designed for human-readable data interchange

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