Basic Syntax

No Semicolons, No Ceremony

Unlike many languages, Python doesn't need semicolons at the end of each line. It also doesn't require a main() function to run. Python scripts execute top-to-bottom, and you can start writing useful code immediately.

print("Hello")
print("World")

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Indentation Is Law

In Python, indentation defines blocks of code. Instead of curly braces, you use spaces or tabs. This forces you to write clean, readable code. Most Python developers use 4 spaces per indentation level.

if 5 > 2:
    print("Five is greater than two")
    print("This is inside the if block")
print("This is outside")

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Variables Without Type Declarations

You don't need to declare variable types in Python. Just assign a value and Python figures out the type automatically.

name = "Alice"
age = 25
height = 5.6
is_student = True

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Comments

Use the # symbol to write comments. Comments are ignored by Python and are only for humans reading the code.

# This is a comment
print("Comments are useful")

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🧪 Quick Quiz

What does Python use to define code blocks?

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