👶 Python Basics | Lesson 02

👶 Python Basics

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Welcome to Python Basics! Mastering this chapter will give you the foundation for everything else in programming. Let’s start with the very simple concepts and grow step by step. 🌱

What You’ll Learn 🎯

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• Python syntax and indentation
• Printing messages
• Basic data types: integers, floats, strings, booleans
• Variables: storing data
• Comments

1. Python Syntax & Indentation 🎨

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• Python cares about indentation! Indentation (spaces at the start of a line) decides structure in Python.
• Every new code block (like after :) uses the same indentation.

if True:
    print("Hello!")  # This line is indented

2. Printing Messages 📢

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Use the print() function to display output.

print("Welcome to Python! 🐍")

Output:

Welcome to Python! 🐍

3. Variables: Storing Data 📦

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A variable is a name for a value. Assignment uses =.

name = "Alex"
age = 21
height = 1.75
is_student = True

• name holds a string ("Alex")
• age is an integer (21)
• height is a float (1.75)
• is_student is a boolean (True)

4. Data Types Explained 🔤

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You can check a variable’s type with type():

print(type(name))    # <class 'str'>
print(type(age))     # <class 'int'>
print(type(height))  # <class 'float'>
print(type(is_student)) # <class 'bool'>

5. Comments 📝

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Use the hash sign (#) to add comments (notes the program ignores).

# This is a comment!
print("Python is fun!")  # This prints a message

Practice Questions with Solutions 🏆

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1. Practice: Create a variable called city that stores your city name and print it.
   • Solution:

city = "Delhi"
print(city)

2. Practice: What is the output?

a = 10
b = 3.5
print(a + b)

- **Solution:**

13.5 3. Practice: Use comments to describe the line. - Solution:

# Assigning a value to temperature
temperature = 37.5

Step-by-Step Mini Project: Printing a Bio Card 🎫

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Let’s use what we learned!

# My Bio Card
name = "Sara"
age = 19
is_new_student = True

print("Name:", name)
print("Age:", age)
print("New Student?", is_new_student)

Output:

Name: Sara
Age: 19
New Student? True

Checklist for This Chapter ✅

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• Understood Python indentation
• Used print() to display output
• Created and used variables of different types
• Used comments to clarify code

You’ve just built a strong Python foundation! All set for more awesome skills ahead! 🚀👏