def factorial(n):
    if n == 0:          # Base case
        return 1
    return n * factorial(n - 1)  # Recursive case

print(factorial(5))  # Output: 120

120

import csv

with open("data.csv", "r") as file:
    reader = csv.reader(file)
    for row in reader:
        print(row)

import csv

with open("output.csv", "w", newline="") as file:
    writer = csv.writer(file)
    writer.writerow(["name", "age", "city"])
    writer.writerow(["Alice", 25, "New York"])

class NegativeValueError(Exception):
    pass

def process_value(value):
    if value < 0:
        raise NegativeValueError("Negative values are not allowed")

process_value(-10)

squares = [x**2 for x in range(5)]

squares = []
for x in range(5):
    squares.append(x**2)

class A:
    def show_a(self):
        print("Class A")

class B:
    def show_b(self):
        print("Class B")

class C(A, B):
    pass

obj = C()
obj.show_a()
obj.show_b()

Class A
Class B

def print_numbers(n):
    if n == 0:
        return
    print(n)
    print_numbers(n - 1)

print_numbers(5)

5
4
3
2
1

try:
    result = 10 / 0
except ZeroDivisionError:
    print("Cannot divide by zero") 

Cannot divide by zero

try:
    number = int("abc")
except ValueError:
    print("Invalid number format")

count = 10

def display():
    print(count)

display()  # Output: 10

10