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Language

Python

Version: 3.4.3

Variables

Variable Declaration in Python

Used to declare a variable which holds a value.

Syntax

variable_name = value
variable_name = None #to initialize without a value

Notes

Variables in Python are dynamically typed, which means a type does not have to be specified, and the variable's type can be changed.

Variable scoping in Python follows the LEGB rule, which is Local (assigned within a function), Enclosing function local (name in local scope of all enclosing functions), Global (available in the entire file), and Built-In (built into the Python library).

Example

length = 5