correct_password = "python123"

username = input("Enter username: ").strip().lower()
password = input("Enter password: ").strip()

if username == "admin" and password == correct_password:
    print("Welcome back Admin!")
elif username == "admin" and password != correct_password:
    print("Wrong password")
else:
    print(f"User {username} not found")

secret = 42
guess = int(input("Guess the number: "))

if guess == secret:
    print("Correct!")
elif guess > secret:
    print(f"Too high — you were off by {guess - secret}")
else:
    print(f"Too low — you were off by {secret - guess}")

count = 1

while count <= 5:
    print(f"Count: {count}")
    count += 1

print("Done")

Count: 1
Count: 2
Count: 3
Count: 4
Count: 5
Done

fruits = ["apple", "banana", "mango"]

for fruit in fruits:
    print(fruit)

apple
banana
mango

for letter in "Python":
    print(letter)

for i in range(5):
    print(i)
# prints 0, 1, 2, 3, 4

for i in range(10):
    if i == 5:
        break
    print(i)
# prints 0, 1, 2, 3, 4 then stops

for i in range(10):
    if i % 2 == 0:
        continue
    print(i)
# prints only odd numbers: 1, 3, 5, 7, 9

secret = 42
attempts = 0

while True:
    guess = int(input("Guess the number: "))
    attempts += 1

    if guess == secret:
        print(f"Correct! You got it in {attempts} attempts")
        break
    elif guess > secret:
        print("Too high, try again")
    else:
        print("Too low, try again")

number = int(input("Enter a number: "))

for i in range(1, 11):
    print(f"{number} x {i} = {number * i}")

fruits = ["apple", "banana", "mango"]
numbers = [1, 2, 3, 4, 5]
mixed = ["Ahmed", 22, True, 9.99]  # lists can hold any types

fruits = ["apple", "banana", "mango"]

print(fruits[0])   # apple
print(fruits[1])   # banana
print(fruits[2])   # mango
print(fruits[-1])  # mango — negative index counts from the end

fruits = ["apple", "banana", "mango"]
fruits[1] = "grape"
print(fruits)  # ['apple', 'grape', 'mango']

fruits.append("orange")     # adds to the end
fruits.insert(1, "kiwi")    # adds at index 1

fruits.remove("apple")   # removes by value
fruits.pop()             # removes last item
fruits.pop(0)            # removes item at index 0
del fruits[2]            # deletes item at index 2

if "mango" in fruits:
    print("Found it")

numbers = [3, 1, 4, 1, 5, 9, 2, 6]

print(len(numbers))       # 8 — how many items
print(sorted(numbers))    # [1, 1, 2, 3, 4, 5, 6, 9] — sorted copy
print(numbers.count(1))   # 2 — how many times 1 appears
print(sum(numbers))       # 31 — adds all numbers
print(min(numbers))       # 1
print(max(numbers))       # 9

numbers.reverse()         # reverses in place
numbers.sort()            # sorts in place

fruits = ["apple", "banana", "mango", "grape", "kiwi"]

print(fruits[1:3])   # ['banana', 'mango'] — index 1 to 2
print(fruits[:3])    # ['apple', 'banana', 'mango'] — from start to 2
print(fruits[2:])    # ['mango', 'grape', 'kiwi'] — from index 2 to end

users = ["Ahmed", "Sara", "Ali", "Fatima"]

for user in users:
    print(f"Hello {user}!")

for index, user in enumerate(users):
    print(f"{index + 1}. {user}")

1. Ahmed
2. Sara
3. Ali
4. Fatima

coordinates = (25.2048, 55.2708)  # latitude, longitude
rgb = (255, 0, 0)                 # red color

print(coordinates[0])  # 25.2048

coordinates[0] = 30  # ERROR — tuples are immutable