Creating a variable in Python is simple. You just assign a value using the = operator.
age = 25
name = "Rahul"
is_student = True
age→ Integername→ Stringis_student→ Boolean
Python assigns the data type automatically based on the value.
Multiple Variable Assignment
Python allows assigning multiple values in a single line.
Assign Multiple Values
a, b, c = 10, 20, 30
Assign Same Value
x = y = z = 100
This makes Python concise and easy to read.
Variable Naming Rules in Python
Python has strict rules for variable names:
✅ Must start with a letter or underscore
✅ Can contain letters, numbers, and underscores
❌ Cannot start with a number
❌ Cannot use special characters
❌ Cannot use Python keywords
Valid Names
user_name
totalMarks
_price
Invalid Names
2value
user-name
class
Case Sensitivity in Variables
Python variables are case-sensitive.
value = 10
Value = 20
Here, value and Value are two different variables.
Dynamic Typing in Python Variables
One powerful feature of Python is dynamic typing. A variable can change its data type during execution.
x = 10
x = "Python"
x = 3.14
Python allows this without any error.
Checking Variable Data Type
You can check the type of a variable using the type() function.
x = 50
print(type(x))
Output:
<class 'int'>
Best Practices for Using Variables
✔ Use meaningful variable names
✔ Follow snake_case naming convention
✔ Avoid single-letter names (except in loops)
✔ Keep variable names readable
Good Example
total_price = 500
Bad Example
tp = 500
Common Beginner Mistakes
❌ Using reserved keywords
❌ Starting variable names with numbers
❌ Forgetting case sensitivity
❌ Using unclear variable names
Avoiding these mistakes makes your code clean and professional.
Conclusion
Variables are the foundation of Python programming. They allow storing data, manipulating values, and building logic. Understanding variables clearly makes learning advanced Python topics much easier.
References
- Internal Reference: https://savanka.com/category/learn/python/
- External Reference: https://www.w3schools.com/python/