Nested If - Else

Part of the Fundamentals section of Coddy's Python journey — lesson 23 of 77.

Nested If-Else statements allow you to check multiple conditions by placing one if-else statement inside another. You can nest an if block inside an else block — this is a common and valid pattern in Python.

Create a basic if-else statement:

age = 18
title = "None"
if age >= 18:
    title = "Adult"
else:
    title = "Minor"

Now let's add a nested condition inside the else block:

age = 18
title = "None"
allowed_to_drink = False
if age >= 18:
    title = "Adult"
else:
    title = "Minor"
    if age >= 13:
        title = "Teenager"
    else:
        title = "Child"

You can also nest a condition inside the if block:

age = 25
title = "None"
allowed_to_drink = False
if age >= 18:
    title = "Adult"
    if age >= 21:
        allowed_to_drink = True
    else:
        allowed_to_drink = False
else:
    title = "Minor"

In both examples, the inner if-else only executes when the outer condition that contains it is met. Placing an if statement inside an else block (or inside an if block) is completely valid — this is exactly what makes it "nested".

Challenge

Beginner

Write a program that determines eligibility for a movie based on age and parental guidance.

Given code (do not modify):

A variable age is defined and assigned a value from input
A variable with_parent is defined and assigned a boolean value — it is True if the input is "true", or False if the input is "false"
A variable message is defined with the value "None"

Your task:
Use nested if-else statements to set the message variable to one of the following strings:

If age is 18 or older, set message to "You can watch any movie".
If age is under 18:
1. If with_parent is True, set message to "You can watch PG-13 movies".
2. If with_parent is False, set message to "You can only watch G-rated movies".

Important: Because with_parent is already a boolean, check it directly (e.g., if with_parent:) — do not compare it to a string like "true" or "True".

Important: The strings must match exactly — including capitalization and punctuation. For example, use "PG-13 movies" (lowercase 'm'), not "PG-13 Movies".

Cheat sheet

Nested if-elif-else statements allow for hierarchical decision-making:

if condition1:
    if condition2:
        # Code for when both conditions are true
    else:
        # Code for when condition1 is true but condition2 is false
else:
    # Code for when condition1 is false

Example of nested conditions:

if age > 18:
    if has_license:
        print("You can drive")
    else:
        print("Get a license first")
else:
    print("Too young to drive")

Nesting can be infinite, allowing for complex decision trees:

if condition1:
    if condition2:
        if condition3:
            # More nested conditions...

Try it yourself

# Get age as an integer
age = int(input())

# Get parental guidance as a boolean (True/False)
with_parent = input() == "true"

# Declare a variable named message with "None"
message = "None"

# Write your nested if-else code here


# Don't change below this line
print(message)