Python #1

Here are some basic Python examples to get you started with your first lesson:

Hello, World!

The classic first program in any language is to print "Hello, World!" to the screen.

print("Hello, World!")

Variables and Data Types

Python supports various data types such as integers, floats, strings, and booleans.

# Integer
age = 25

# Float
height = 5.9

# String
name = "Alice"

# Boolean
is_student = True

Basic Operations

You can perform arithmetic operations with Python.

# Addition
sum = 5 + 3

# Subtraction
difference = 10 - 2

# Multiplication
product = 4 * 7

# Division
quotient = 20 / 4

# Exponentiation
power = 2 ** 3

Lists

Lists are used to store multiple items in a single variable.

fruits = ["apple", "banana", "cherry"]
print(fruits[0])  # Output: apple

# Adding an item to the list
fruits.append("orange")

Conditional Statements

Conditional statements allow you to execute code based on certain conditions.

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

Loops

Loops are used for iterating over a sequence (like a list or a string).

For Loop

for fruit in fruits:
    print(fruit)

While Loop

count = 0
while count < 5:
    print(count)
    count += 1

Functions

Functions are blocks of code that only run when they are called.

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

print(greet("Bob"))  # Output: Hello, Bob!

These examples cover some of the basics of Python programming.