Python

Python#

Python is a high-level, interpreted programming language known for its readability and simplicity. Created by Guido van Rossum and first released in 1991, Python has become one of the most popular programming languages in the world for beginners and professionals alike.

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Why Learn Python?#

  • Easy to learn: Clear, readable syntax with minimal punctuation

  • Versatile: Used in web development, data science, AI, automation, and more

  • Huge community: Extensive libraries, frameworks, and support resources

  • In-demand skill: Highly sought after in the job market

Your First Python Program#

After installing Python from python.org, open a text editor and write:

print("Hello, World!")

Save this as hello.py and run it from your command line with:

python hello.py

Congratulations! You’ve written your first Python program.

Python Basics#

Variables#

name = "Alex"
age = 25
is_student = True

Data Types#

  • Strings: Text (“Hello”)

  • Integers: Whole numbers (42)

  • Floats: Decimal numbers (3.14)

  • Booleans: True/False values

  • Lists: Ordered collections ([1, 2, 3])

  • Dictionaries: Key-value pairs ({“name”: “Alex”, “age”: 25})

Control Flow#

if age >= 18:
    print("You are an adult")
else:
    print("You are a minor")

Loops#

# Print numbers 0-4
for i in range(5):
    print(i)

# Loop while a condition is true
count = 0
while count < 5:
    print(count)
    count += 1

Functions#

def greet(name):
    return f"Hello, {name}!"

message = greet("Alex")
print(message)  # Prints: Hello, Alex!

Next Steps#

  • Practice with simple projects like calculators or text games

  • Explore Python libraries for your interests (web, data, games)

  • Join online communities (Reddit’s r/learnpython, Stack Overflow)

  • Work through tutorials on platforms like Codecademy, freeCodeCamp

Resources#