الحلقات (Loops)

# range(1, 6) gives: 1, 2, 3, 4, 5  (stops BEFORE 6)
for i in range(1, 6):
    print(f"7 x {i} = {7 * i}")

customers = ["Ali", "Sara", "Omar"]
for customer in customers:
    print(f"Hi {customer}, your order has shipped!")

correct_pin = "2468"
attempts = 0

while attempts < 3:
    pin = input("Enter PIN: ")
    if pin == correct_pin:
        print("Unlocked")
        break                   # exit the loop immediately
    attempts += 1               # same as: attempts = attempts + 1
    print(f"Wrong! {3 - attempts} tries left")
else:
    # runs only if the loop ended WITHOUT break
    print("Phone locked")

# Sum only the even numbers from 1 to 10
total = 0
for n in range(1, 11):
    if n % 2 != 0:
        continue                # skip odd numbers
    total += n
print("Sum of evens:", total)