JavaScript Functions and Scope

When too many variables exist in a namespace or variable names are reused.

• Local Variables

• Identifier

• Scope Pollution

• Parameter

Statements that exist within curly braces.

• Function

• Identifier

• Scope Pollution

• Blocks

The space in our code that contains globally scoped information.

• Global Namespace

• Identifier

• Scope Pollution

• Blocks

Variables that exist within global scope.

• Global Namespace

• Argument

• Global Variables

• Blocks

Allow functions to accept input and perform a task using the inputs.

• Global Namespace

• Parameter

• Argument

• Blocks

Allow parameters to have a pre-determined value in case there is no argument passed into the function or if the argument is undefined when called.

• Global Namespace

• Parameter

• Argument

• Default Parameters

A reusable block of code that groups together a sequence of statements to perform a specific task.

• Function

• Identifier

• Argument

• Blocks

The name of the function.

• Function

• Identifier

• Argument

• Blocks

Variables that exist within block scope.

• Function

• Global Variables

• Local Variables

• Blocks

The values that are passed on to the function when it is called.

• Function

• Identifier

• Blocks

• Argument