• JS Where To Write (Internal, Inline, External) —→ Put Scripts at the Bottom

  • js comment(Single,Multi)

  • output to user(alert,document) - console

  • auto semicolon insertion

  • Js variables and Rules

  • Data Type (Primitive, non-Primitive [Reference Type] )

  • String Syntax And Characters Escape Sequences

  • Concatenation

  • Some rules of contact && merge

  • Prompt (Get Data From User)