Python Nested Conditionals & Complex Boolean Expressions

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Instructions

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Quick review

Complex Boolean expressions (two conditions)

age >= 13 and age <= 19     # both must be True
day == "Sat" or day == "Sun"  # at least one True
not is_raining and temp > 70  # not flips one side

Nested if (two levels)

if has_ticket:              # level 1
    if age >= 13:           # level 2
        print("Enjoy!")
    else:
        print("Pick another")
else:
    print("Buy a ticket")

Nested if with a complex condition

if is_member:
    if paid and not banned:
        print("Come in")
    else:
        print("See the desk")
elif guest_pass:
    print("Guest entry")

and is True only when both conditions are True. or is True when at least one is True. not flips True and False.
Every condition in this assignment joins no more than two comparisons, and every nested if goes no more than two levels deep.
Write a complete comparison on each side: team == "red" or team == "blue", not team == "red" or "blue" (the or trap, which is always True).
The inner if is only checked when the outer condition is True. Level 1 code is indented 4 spaces, level 2 code is indented 8 spaces.
An else or elif belongs to the if it lines up with.

Error messages you may see in the terminal

SyntaxError: invalid syntax can mean half a comparison (age >= 13 and <= 19), or AND, &&, or || instead of and / or.
SyntaxError: invalid syntax. Maybe you meant '==' or ':=' instead of '='? means you used = where a comparison needs ==.
IndentationError: expected an indented block after 'if' statement means the line after an if is not indented further.
No error at all is possible too! The or trap and the wrong and / or run without an error but give the wrong answer. Compare your output with the expected output.

How this works

Enter your first name, last name initial, and class period, then click Start Assignment. Your start time is recorded.
The assignment opens in a Python editor with four files (tabs). Each orange numbered box or drop down is one item. There are 20 items.
Click ▶ Run on any part to see what Python prints. On Parts 1 to 3, compare it with the expected output. On Part 4, Run shows what each small program prints. Run does not grade you, so check your work carefully.
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Turning it in: save a PDF (required for a grade)

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Turn in the PDF where your teacher tells you to.

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Part	Task	Items	Points
1	Build complex conditions with and, or, not inside nested ifs	1 to 5	5
2	Complete nested if / elif / else structures and fix their indentation	6 to 10	5
3	Debug: fix the complex condition in each nested if	11 to 15	5
4	Predict the output of nested code	16 to 20	5
	Total (1 point per item)	20	20

Student Information

Student:

Period:

Date:

Start:

Elapsed: 00:00

Items answered: 0 of 20

nested_conditionals — Python 3

Task: Each program has a comment that says what it should do. Choose the right logical operator, or type the condition.

Item 4: type the whole condition (two comparisons joined with and or or).
Item 5: type the whole inner if line. The 4 spaces in front are already there.

Pack your lunch! Beach day! Teen hours: come in! Snow day!

Task: Complete each nested if / elif / else. Watch which if each branch lines up with.

Items 9 and 10 already have code in them, but the indentation is wrong. Fix the spaces at the start of the line.

A with honors Price: 8 Access granted Charging

Task: Every inner condition has one bug. Some cause an error, and some run but give the wrong answer. Fix each condition so the program does what the comment says. Keep it to two comparisons or fewer.

No jersey for your team yet Sleep in Teen discount applied Ready to graduate Enjoy your book

Task: Trace each small program in your head and choose what it prints. Work out each condition step by step, and watch the indentation to see which if each else belongs to.

TerminalProblemsOutput

Your Score

Student

Period

Date

Start time

End time

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#	Question	Your answer	Correct answer	Points	Feedback

Your completed code

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Nested Conditionals with Complex Conditions

Instructions

Quick review

Error messages you may see in the terminal

How this works

Turning it in: save a PDF (required for a grade)

Student Information

Your Score

Your completed code