3.7 Nested Conditionals in Python

A nested conditional is an if statement inside another if, elif, or else block. The outer decision chooses a path first, and the inner decision checks a more specific condition inside that path. This lesson uses one theme from start to finish: the accounts, homework, meals, and sports that shape a high school student’s daily routine.

1. LxD Cycle Process

  1. Empathize: A high school day contains decisions inside other decisions: account access before page permissions, homework before free time, lunch planning before practice, and practice before dinner. Nested conditionals can be confusing because indentation determines which decision owns each inner branch.

  2. Define:
    • POV: CSP students need familiar daily-life examples that make the outside-to-inside order of nested decisions visible.
    • Learning Goal: Students will trace, write, test, and explain nested conditionals in a Python student-life dashboard.
  3. Ideate:
    • HMW Question: How might we turn a student’s account, homework, meals, and sports schedule into clear nested decisions?
    • Activity: Trace an after-school plan, repair an account check, test a lunch-and-practice decision, and build a daily routine dashboard.

  4. Prototype: Build Tech Talk examples, three Popcorn Hacks, and one Homework Hack that all use the same student-life theme.

  5. Test: Run every code runner with different account and schedule values, confirm each meaningful path, collect feedback, and record revisions in Section 5.

2. Lesson Plan

Learning Objective: Use nested if statements in Python when a student-life decision should happen only after an earlier account or schedule condition selects a path.

Success Criteria: You can trace a nested conditional, explain how indentation controls its branches, write a student-life decision with at least three outcomes, and test every meaningful path.

Lesson Theme — High School Daily Life Dashboard

The lesson follows one student through a normal day:

  • Accounts: log in before checking page permissions.
  • Homework: check whether work is assigned before checking whether it is finished.
  • Meals: plan lunch or a snack around the school and practice schedule.
  • Sports: coordinate practice with homework and dinner.

Tech Talk 1: Student Account Decisions

The outer condition is checked first. The inner condition is reached only when execution enters the block that contains it.

has_account = True
password_correct = False

if has_account:
    if password_correct:
        print("Login approved")
    else:
        print("Incorrect password")
else:
    print("Create an account first")

Python checks has_account before it checks password_correct. If has_account is False, the password condition is skipped because it belongs inside the first branch.

Tech Talk 2: Homework Before Dinner

Python uses indentation to show which statements belong together. Here, the program checks whether homework exists before deciding whether the student can move on to dinner or free time.

homework_assigned = True
homework_finished = False

if homework_assigned:
    if homework_finished:
        print("Homework finished — time for dinner")
    else:
        print("Finish homework before dinner")
else:
    print("No homework tonight — check tomorrow's schedule")

This homework example has three possible paths, but only one message prints during a run. Moving the inner else to the wrong indentation level would change which if statement it belongs to.

Tech Talk 3: Nested and Compound Conditions Are Different

A compound condition checks multiple Boolean expressions at the same time. A nested conditional makes the second check depend on the first path.

Purpose Python example
Both rules must be true for one result if practice_today and homework_finished:
Check homework only when practice is scheduled if practice_today: then nested if homework_finished:

The same nested structure appears in three forms:

Form Outer and inner decision
Python if condition_a: then indented if condition_b:
JavaScript if (conditionA) { if (conditionB) { ... } }
College Board pseudocode IF(conditionA) { IF(conditionB) { ... } }

3. Popcorn Hacks & Practice Tasks

Popcorn Hack 1: After-School Homework Plan (Beginner)

Start by tracing completed code. Predict whether the student gets free time, must finish homework, or follows a weekend plan. Then run the code and test every path.

Code Runner Challenge

Popcorn Hack 1 - Test the after-school homework plan

View IPYNB Source 
# CODE_RUNNER: Popcorn Hack 1 - Test the after-school homework plan

is_weekday = True
homework_finished = False

if is_weekday:
    if homework_finished:
        print("Free time")
    else:
        print("Finish homework")
else:
    print("Weekend plan")
Lines: 1 Characters: 0
Output
Click "Run" in code control panel to see output ...

Do these three things:

  1. Write the message that will print.
  2. Name the outer branch and inner branch the program follows.
  3. Change the values to reach each of the other two outcomes.

Popcorn Hack 2: Repair the Student Account Check (Intermediate)

Next, debug existing code. The student dashboard should check has_permission only after the student logs in, but the permission decision is not indented correctly.

Code Runner Challenge

Popcorn Hack 2 - Repair the student account check

View IPYNB Source 
# CODE_RUNNER: Popcorn Hack 2 - Repair the student account check

logged_in = True
has_permission = False

if logged_in:
    print("Account found")
if has_permission:
    print("Page opened")
else:
    print("Permission needed")
Lines: 1 Characters: 0
Output
Click "Run" in code control panel to see output ...

Do these four things:

  1. Explain why the current code is not nested.
  2. Move the permission check inside the logged-in branch.
  3. Add an outer else that prints Log in first.
  4. Test all three possible messages.

Popcorn Hack 3: Lunch and Sports Practice (Advanced)

Now complete a partial solution. A student needs to plan lunch and decide whether to bring an extra snack for after-school practice. Add the missing inner decisions, test all four paths, and then translate the finished structure.

Code Runner Challenge

Popcorn Hack 3 - Test the lunch and sports-practice plan

View IPYNB Source 
# CODE_RUNNER: Popcorn Hack 3 - Test the lunch and sports-practice plan

lunch_packed = True
practice_after_school = True

if lunch_packed:
    # TODO: Add a nested conditional that checks practice_after_school.
    pass
else:
    # TODO: Add another nested conditional that checks practice_after_school.
    pass
Lines: 1 Characters: 0
Output
Click "Run" in code control panel to see output ...

Your completed code should print four different recommendations: packed lunch with practice, packed lunch without practice, buying lunch with practice, and buying lunch without practice. Change both values to test all four outcomes. Then write the same structure in JavaScript and College Board pseudocode and explain which condition is checked first.

Homework Hack: High School Daily Routine Dashboard

Write your own Python nested conditional from scratch to guide a student through an ordinary school day. The starter runner gives you only the student-life data; you must design the complete decision structure yourself. Your dashboard should combine account access, homework, meals, and sports practice.

Your finished program must:

  1. store at least four student-life values, including login status, homework status, a meal decision, and sports-practice status,
  2. use an outer account if / else before checking the student’s schedule,
  3. contain at least two nested decisions,
  4. produce at least four clear recommendations,
  5. test inputs that reach every meaningful outcome,
  6. include 2–3 sentences explaining why the inner checks depend on the outer decisions.

Submission: Use the runner below to build and test your dashboard. When it works, scroll to the end of this page to write or paste your final Python code into the Code Submission form and submit it.

Code Runner Challenge

Homework Hack - Build a high school daily routine dashboard

View IPYNB Source 
# CODE_RUNNER: Homework Hack - Build a high school daily routine dashboard

student = {
    "logged_in": True,
    "homework_finished": False,
    "lunch_packed": True,
    "practice_today": True
}

# Write your complete nested conditional below.
# Do not delete the starter data. Test several value combinations.
Lines: 1 Characters: 0
Output
Click "Run" in code control panel to see output ...

4. Grading Plan (1 Point Total)

Activity Points What earns the points
Popcorn Hack 1 0.15 Correctly trace and test all after-school homework outcomes.
Popcorn Hack 2 0.15 Correctly nest the account permission check and test all login outcomes.
Popcorn Hack 3 0.20 Test all lunch/practice paths, translate the structure, and explain the execution order.
Homework Hack 0.50 Build and submit a working student-life dashboard covering accounts, homework, meals, and sports; test all outcomes and explain the nesting.
Total 1.0  

5. Lesson Revisions & Feedback Evidence

  • Kept the numbered 1 through 5 lesson structure used by the Boolean Expressions and Random Values lessons.
  • Unified every Tech Talk and hack around one high-school daily-life theme: accounts, homework, meals, and sports.
  • Added assignment metadata so the page provides a code-submission form.
  • Changed the permalink to /python/nested-conditionals/student-life to prevent a collision with another team’s lesson.
  • Enabled the table of contents for faster navigation.
  • Feedback applied: Added a clear instruction telling students to scroll to the bottom of the page to write or paste and submit their final Homework Hack code.

Submit Your Homework

Scroll to the Code Submission form directly below this lesson. Choose Python, write or paste only your final Homework Hack code, add short testing notes, and submit. Do not paste Markdown code fences.

Submit Assignment

Your code will be saved as a Gist and reviewed automatically. You must be logged in to submit.

Need to update a submission later? Open the submissions dashboard.