In Python, variables act as labeled boxes for storing data. They provide easy access and manipulation throughout your code, making them essential for organizing your work. Let’s dive into the key concepts:
Creating Variables:
No need for prior declaration—simply assign a value to a name:
age = 30
name = "Alice"
Naming Rules:
Data Types:
Python variables hold various data types:
Dynamic Typing:
Assignment and Reassignment:
Use = to assign values.
Reassign new values at any time:
x = 10
x = "Hello" # Now x holds a string
Scope:
Interesting Traits:
References, not values: Variables store references to objects, not values directly.
Multiple assignments:
Assign multiple values in one line:
x, y, z = 10, 20, 30
Simultaneous assignment and swapping:
a, b = 5, 10 a, b = b, a # Swaps a and b
Chained assignments:
Use one variable’s value to assign to another:
x = y = 10 # Both x and y hold 10
Best Practices:
Remember: Variables are your trusty sidekicks for organizing and tracking information in Python programs. Master their usage for efficient and effective code!