Key Concepts

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function myFunction() { var pizzaName = "Volvo"; // Code here can use pizzaName } // Code here can't use pizzaName

Scope is a concept that refers to where values and functions can be accessed.

Various scopes include:

  • Global scope (a value/function in the global scope can be used anywhere in the entire program)
  • File or module scope (the value/function can only be accessed from within the file)
  • Function scope (only visible within the function),
  • Code block scope (only visible within a { ... } codeblock)
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