Variables

Variables are containers that store data values. In Python, you create a variable by assigning a value to a name.

Creating Variables

Variable Naming Rules

• Must start with a letter or underscore
• Can contain letters, numbers, and underscores
• Case-sensitive (name and Name are different)
• Cannot be Python keywords (like if, for, while)

Exercises

Multiple Assignment

Swapping Variables

Practice Playground

Key Takeaways

• Create variables with = (assignment operator)
• Use descriptive, snake_case names
• Variables can be reassigned
• Python allows multiple assignment: a, b = 1, 2
• Swap values easily: a, b = b, a