Python Beginner Course

print("Welcome to Python!")
  print("Your name")

integer_var = 5
float_var = 3.14
string_var = "Hello, Python!"
bool_var = True
print("Integer:", integer_var)
print("Float:", float_var)
print("String:", string_var)
print("Boolean:", bool_var)

import math

radius = 5
area_circle = math.pi * radius ** 2
print("Circle:", area_circle)

length, width = 10, 4
area_rectangle = length * width
print("Rectangle:", area_rectangle)

base, height = 8, 3
area_triangle = 0.5 * base * height
print("Triangle:", area_triangle)

a = int(input("Enter first number: "))
b = int(input("Enter second number: "))

print("Addition:", a + b)
print("Subtraction:", a - b)
print("Multiplication:", a * b)
print("Division:", a / b)
print("Integer Division:", a // b)
print("Modulo:", a % b)
print("Exponentiation:", a ** b)

x = int(input("Enter a number: "))
if x >= 10 and x <= 20:
    print("The number is between 10 and 20.")
else:
    print("The number is outside the range.")

count = 0
product = 1
difference = 6*5*3*2*1
for i in range(1, 6):
    count += 1
    product *= i
    difference -= count
print(f"Count: {count}, Product: {product}, Difference: {difference}")

num = int(input("Enter a number: "))
if num % 2 == 0 and num % 3 == 0:
    print("Divisible by both 2 and 3.")
elif num % 2 == 0:
    print("Divisible by 2.")
elif num % 3 == 0:
    print("Divisible by 3.")
else:
    print("Divisible by neither 2 nor 3.")

age = int(input("Enter your age: "))
if age >= 18:
    print("Adult")
elif age >= 13:
    print("Teenager")
else:
    print("Child")

score = int(input("Enter your score: "))
if score >= 90:
    print("Grade A")
elif score >= 80:
    print("Grade B")
elif score >= 70:
    print("Grade C")
elif score >= 60:
    print("Grade D")
else:
    print("Grade F")

word = "hello"
for char in word:
    print(char)

for i in range(5, 16):
    if i % 2 == 1:
        print(i)

mylist = ["apple", "banana", "cherry"]
for index, value in enumerate(mylist):
    print(index, value)

factorial = 1
for i in range(1, 6):
    factorial *= i
print(factorial)

for i in range(1, 6):
    for j in range(1, 6):
        print(i * j, end="\t")
    print()

i = 1
while i <= 10:
    print(i)
    i += 1

i = 10
while i >= 1:
    print(i)
    i -= 1

while True:
    user_input = input("Enter something (type 'exit' to quit): ")
    if user_input == "exit":
        break
    print(f"You typed: {user_input}")

i = 1
total = 0
while i <= 100:
    total += i
    i += 1
print(total)

i = 0
while i < 10:
    print(2 ** i)
    i += 1

for i in range(0, 11, 2):
    print(i)

numbers = [int(x) for x in input("Enter numbers separated by spaces: ").split()]
total = 0
for num in numbers:
    total += num
print(f"The sum of the numbers is: {total}")

numbers = [5, 2, 9, 1, 3]
numbers.sort()
numbers.append(7)
numbers.remove(1)
print(numbers)

mylist = [10, 20, 30, 40]
print(mylist[0])   # First element
print(mylist[-1])  # Last element

mylist = [1, 2, 3]
mylist[1] = 99
print(mylist)

mylist = [10, 20, 30]
for item in mylist:
    print(item)

mylist = [1, 2, 3, 4]
middle = mylist[1:3]
print(middle)

my_tuple = (1, 2, 3)
a, b, c = my_tuple
print(a, b, c)

my_tuple = (10, 20, 30)
# my_tuple[1] = 99  # This will raise an error
print("Tuples cannot be modified.")

single = (42,)
print(type(single))  # 

mylist = [1, 2, 3]
mytuple = tuple(mylist)
print(mylist)
print(mytuple)

mytuple = ("a", "b", "c")
for item in mytuple:
    print(item)

mytuple = (100, 200, 300)
print(mytuple[-1])

print(friends["Bob"])

friends["David"] = 35
print(friends)

del friends["Charlie"]
print(friends)

for name, age in friends.items():
    print(f"{name} is {age} years old.")

if "Alice" in friends:
    print("Alice is in the dictionary.")
else:
    print("Alice is not in the dictionary.")

fruits = {"apple", "banana", "cherry"}
print(fruits)

fruits.add("orange")
print(fruits)

fruits.remove("banana")
print(fruits)

set1 = {"apple", "banana", "cherry"}
set2 = {"banana", "cherry", "date"}

print(set1 | set2)  # Union
print(set1 & set2)  # Intersection
print(set1 - set2)  # Difference

if "apple" in fruits:
    print("Apple is in the set.")
else:
    print("Apple is not in the set.")

for fruit in fruits:
    print(fruit)

def square(x):
    return x * x
print(square(int(input())))

def is_even(n):
    return n % 2 == 0

print(is_even(4))  # True
print(is_even(5))  # False

def factorial(n):
    result = 1
    for i in range(1, n + 1):
        result *= i
    return result

print(factorial(5))

def square_list(numbers):
    return [x * x for x in numbers]

print(square_list([1, 2, 3, 4]))

def count_vowels(text):
    vowels = 'aeiouAEIOU'
    count = 0
    for char in text:
        if char in vowels:
            count += 1
    return count

print(count_vowels("hello world"))

def demo_scope():
      message = "Hello from inside"
      print(message)
  
  demo_scope()
  # print(message)  # Uncommenting this will raise an error because 'message' is not defined outside

cube = lambda x: x ** 3
  print(cube(3))

add_ten = lambda x: x + 10
  print(add_ten(5))  # Output: 15

numbers = [1, 2, 3, 4]
  squares = list(map(lambda x: x ** 2, numbers))
  print(squares)

numbers = [1, 2, 3, 4, 5, 6]
  evens = list(filter(lambda x: x % 2 == 0, numbers))
  print(evens)

pairs = [(1, 3), (2, 1), (4, 2)]
  sorted_pairs = sorted(pairs, key=lambda x: x[1])
  print(sorted_pairs)