hartleybrody

Javascript has two kinds of scope:

1. Local (inside a function)
2. Global (outside a function)

The var Keyword

• Using the var keywords creates the variable in the current scope
  • If the current scope is global, then var is unnecessary (see below)
  • If the current scope is local, then you’re creating a local variable in the current scope
• If you don’t use var, then Javascript goes up the “scope chain” to see if it’s already been declared