Lesson 6: Nested if and elif

Topics Covered:

• Using if, elif, and else
• Creating multiple decision paths
• Making a simple text-based adventure game

What is elif?

elif stands for “else if”. It allows more than one condition to be checked:

color = input("Pick a color: ")

if color == "red":
    print("Red is bold!")
elif color == "blue":
    print("Blue is calm.")
else:
    print("That's a nice color!")

Nested if Statements

You can put one if inside another to check multiple levels of logic:

age = int(input("How old are you? "))

if age >= 10:
    favorite = input("What's your favorite subject? ")
    if favorite == "math":
        print("Math rocks!")
    else:
        print("Cool choice!")
else:
    print("You're still very young!")

Activity: Text-Based Adventure

Create a small game where the user chooses a direction:

direction = input("Do you go left or right? ")

if direction == "left":
    print("You find a treasure chest!")
elif direction == "right":
    print("You fall into a pit!")
else:
    print("You stand still and nothing happens.")

Challenge

• Ask the user to pick a fruit (apple, banana, orange)
• Respond with a unique message for each
• Handle unknown fruits with an else

fruit = input("Pick a fruit: ")

if fruit == "apple":
    print("An apple a day keeps the doctor away!")
elif fruit == "banana":
    print("Bananas are full of potassium!")
elif fruit == "orange":
    print("Oranges are tasty and full of vitamin C!")
else:
    print("I don't know that fruit!")