#   conditional statements.

#   Examples of a simple if statement.

#   score passing?
score = int(input("Your exam score: "))
if score >= 70:
    print("Congratulations! You passed the exam.")
    print("Keep up the good work.")
    
#   version 2: improper identation.
score = int(input("Your exam score: "))
if score >= 70:
    print("Congratulations! You passed the exam.")
print("Keep up the good work.")

#   membership discount
price = float(input("price: "))
is_member = True    #   Assume to be a member.
if is_member:
    price *= 0.9  # Apply 10% discount
    print(f"Final member price: ${price:.2f}")

#   Add free chocolate for coupon.    
shopping_cart = ["milk", "bread"]
is_member = True
if is_member:
    shopping_cart.append("chocolate")
print(f"Your shopping cart: {shopping_cart}")

#   set is_hot_day. v1
temperature = float(input("current temperature: "))
is_hot_day = False
if temperature > 85:
    is_hot_day = True
print(f"Is it a hot day ({temperature} C)? {is_hot_day}")

#   set is_hot_day. v2
temperature = float(input("current temperature: "))
if temperature > 85:
    is_hot_day = True
else:
    is_hot_day = False
print(f"Is it a hot day ({temperature} C)? {is_hot_day}")

#   set is_hot_day. v3
temperature = float(input("current temperature: "))
is_hot_day = temperature > 85
print(f"Is it a hot day ({temperature} C)? {is_hot_day}")