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02 #Python - Variables
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What are Variables?
Variables in Python are containers for storing data values.
Think of them as labeled boxes where you can put different types of information.
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Key Concepts:
1. Variable Assignment : In Python, we use the `=` sign to assign a value to a variable.
2. Dynamic Typing : Python is dynamically typed, meaning you don't need to declare
the type of a variable explicitly.
3. Naming Conventions : Variable names should be descriptive and follow certain rules.
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Variable Naming Rules:
1. Must start with a letter or underscore
2. Can contain letters, numbers, and underscores
3. Are case-sensitive
4. Cannot be Python keywords
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Naming Variables
Good examples:
user_name = "Mohanad"
age_in_years = 30
_private_variable = "MF2Learn"
car = 'Toyota'
_myCar = 'Nissan'
Bad examples:
2nd_place = "Silver" # Can't start with a number
user-name = "Alice" # Can't use hyphens
class = "Python 101" # 'class' is a Python keyword
3cars = 'car1 car2 car3'
car1 = 'My car'
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Case-sensetive
age = 21
Age = 30
AGE = 48
print(Age)
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