• Total 7 Datatypes in Javascript
• Primitive Datatypes (6)
  • undefined:
    • variables are undefined after initialization
    • numerical operations on undefined cause NaN
    • stringoperations on undefined cause "undefined"-String as result
  • null
  • boolean
  • string
  • symbol
  • number
• Complex Datatypes (1)
  • object: complex datatype!
• Get Datatype (Code Example):

typeof("hello");  // returns datatype as string

Number.isInteger("2017"); // false
Number.isInteger(2017);   // true