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Python Tutorial

Variables and Data Types

Work with numbers, strings, booleans, type conversion and simple expressions.

Concept

A variable is a name bound to a value. Python determines the value type at runtime, so you do not declare a fixed variable type before assignment.

Common built-in types include int, float, str and bool. Conversions such as int(), float() and str() are useful when input and calculations use different representations.

Example

age = 21
price = 499.50
course = "Python"
is_active = True
print(course, age, price, is_active)
print(int("25") + 5)
Type the example yourself and change at least one value. Small experiments reveal syntax and behavior faster than passive reading.

Practice Tasks

  1. Create variables for student name, age and fee.
  2. Convert a numeric string to an integer and add 10.
  3. Use type() to inspect at least four values.

Key Takeaways

  • Names can be rebound to new values.
  • Built-in data types support different operations.
  • Convert input deliberately before calculations.
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Conditions and Loops →