🐍 Lesson 6: Making Decisions

The variable num is 50. Write an if that prints Big number! when num is greater than 10.

num = 50
if num > 10:
    print("Big number!")

The variable n is 8. Print Even if it divides evenly by 2, otherwise print Odd. (Hint: use n % 2 == 0.)

n = 8
if n % 2 == 0:
    print("Even")
else:
    print("Odd")

A test score is 85. Print the letter grade using if/elif/else: 90+ → A, 80–89 → B, 70–79 → C, otherwise → F. For 85 it should print B.

score = 85
if score >= 90:
    print("A")
elif score >= 80:
    print("B")
elif score >= 70:
    print("C")
else:
    print("F")

Ask the user their height in cm. If it's 120 or more, let them on the ride; otherwise, tell them to grow a bit more. Try different heights!

With a = 14 and b = 9, print a is bigger, b is bigger or They are equal — whichever is true. Then change the numbers and run again to test the other branches!

a = 14
b = 9
if a > b:
    print("a is bigger")
elif b > a:
    print("b is bigger")
else:
    print("They are equal")

With n = -7, print positive, negative or zero. Use one if, one elif and one else.

n = -7
if n > 0:
    print("positive")
elif n < 0:
    print("negative")
else:
    print("zero")

A ride needs riders to be at least 8 years old and at least 120 cm tall. With age = 10 and height = 115, print You may ride! or Sorry, not yet. using and.

age = 10
height = 115
if age >= 8 and height >= 120:
    print("You may ride!")
else:
    print("Sorry, not yet.")

Entry is free if you are under 5 or over 65. With age = 70, print Free entry! or Please pay $10 using or.

age = 70
if age < 5 or age > 65:
    print("Free entry!")
else:
    print("Please pay $10")

With is_raining = False, use if not is_raining: to print Go outside! ☀️, otherwise print Stay in and code. 🌧️.

is_raining = False
if not is_raining:
    print("Go outside! ☀️")
else:
    print("Stay in and code. 🌧️")

The word in also asks questions. With password = "dragon123", print Has a number if "1" is in it, and print Long enough if it has 8 or more characters. Two separate if statements — both should print here.

password = "dragon123"
if "1" in password:
    print("Has a number")
if len(password) >= 8:
    print("Long enough")

Ticket prices: under 5 is free, 5–12 costs $8, 13–64 costs $15, 65 and over costs $10. With age = 13, print just the price line, like Price: $15. Test it by changing age to 3, 9 and 70 too!

age = 13
if age < 5:
    price = 0
elif age <= 12:
    price = 8
elif age <= 64:
    price = 15
else:
    price = 10
print(f"Price: ${price}")

With logged_in = True and is_admin = False: if the user is logged in, then check whether they are an admin — print Welcome, boss! for an admin, Welcome, user! for a normal one. If they are not logged in at all, print Please log in.

logged_in = True
is_admin = False
if logged_in:
    if is_admin:
        print("Welcome, boss!")
    else:
        print("Welcome, user!")
else:
    print("Please log in.")

With player = "rock" and computer = "scissors", decide the winner and print exactly one of Player wins!, Computer wins! or It's a tie!. Remember: rock beats scissors, scissors beats paper, paper beats rock. Try all the combinations!

player = "rock"
computer = "scissors"
if player == computer:
    print("It's a tie!")
elif player == "rock" and computer == "scissors":
    print("Player wins!")
elif player == "scissors" and computer == "paper":
    print("Player wins!")
elif player == "paper" and computer == "rock":
    print("Player wins!")
else:
    print("Computer wins!")

Write a short story where variables decide what happens: has_key, coins, brave… Use at least three if statements so the ending changes when you change the variables. Then change them and run it again! 🗝️