Variables in Python
Variables are named containers for storing data values. In Python, you create a variable simply by assigning a value to a name – no need to declare the type beforehand.
Python is dynamically typed, meaning the type is determined at runtime and can change.
Creating Variables – Assignment
Use the equals sign = to assign a value.
Reassignment
You can change the value (and even type) of a variable anytime.
Naming Rules and Conventions
- Must start with a letter or underscore (_)
- Can contain letters, numbers, underscores
- Case-sensitive (age and Age are different)
- Use snake_case (lowercase with underscores) – Python convention
- Avoid Python keywords (like print, if, for)
Multiple Assignment
Assign multiple variables in one line.
Swapping Variables
Quick Quiz
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