Python Loops & Conditionals — Let AI Draft, You Decide

If-statements and loops are where programs come alive. You'll write both kinds, then see where AI autocomplete helps and where it lies.

Builders · AI-Assisted Coding · ~18 min read

Print / PDF

If this, then that

A conditional lets your program make choices. An if-statement runs a block of code only when a condition is True. An else runs when it is False. An elif is 'else if' — check another condition.

Python uses indentation, not braces. Four spaces is the standard.

python

score = 87 if score >= 90: grade = "A" elif score >= 80: grade = "B" elif score >= 70: grade = "C" else: grade = "try again" print(f"You got a {grade}.")

Loops: doing a thing many times

for-loops are for 'I know how many times.' while-loops are for 'until X happens.'

python

# for-loop over a range of numbers for i in range(5): # 0, 1, 2, 3, 4 print(f"Step {i}") # for-loop over a list names = ["Ava", "Ben", "Cy"] for name in names: print(f"Hi, {name}!") # while-loop: run until a condition turns False countdown = 3 while countdown > 0: print(countdown) countdown -= 1 print("Go!")

Truthiness — Python's clever shortcut

In Python, empty containers are False. This makes if-statements read like English.

python

# These values are all 'falsy': they act like False in conditions for value in [0, "", [], None, False]: if not value: print(f"{value!r} is falsy") # Everything else is 'truthy' items = ["apple", "banana"] if items: # same as: if len(items) > 0 print("We have items!")

Mini-exercise: FizzBuzz

1Write a loop from 1 to 20
2If the number is divisible by 3, print 'Fizz'
3If divisible by 5, print 'Buzz'
4If divisible by both, print 'FizzBuzz'
5Otherwise print the number

Compare the options

Task	Autocomplete is great	Autocomplete often lies
Standard FizzBuzz	Yes	No
Domain-specific rules	Rarely	Often — invents fake field names
While-loop termination	Sometimes	Forgets to decrement the counter

Key terms in this lesson

Big idea: conditionals and loops let the computer make millions of small decisions. AI drafts them fast — but you are the one who owns whether the logic is actually right.

End-of-lesson quiz

Check what stuck

8 questions · Score saves to your progress.

Lesson help

Questions are best handled with a grown-up here.

For this age range, Tendril keeps freeform AI chat paused until parent/guardian consent and child-safe moderation are fully verified. Use the quiz, notes, and related lessons below, or ask a parent, guardian, teacher, or librarian to work through the question with you.

Progress saved locally in this browser. Sign in to sync across devices.

Related lessons

Python Loops & Conditionals — Let AI Draft, You Decide

If this, then that

Loops: doing a thing many times

Truthiness — Python's clever shortcut

Mini-exercise: FizzBuzz

Questions are best handled with a grown-up here.

Keep going

Python Loops & Conditionals — Let AI Draft, You Decide

If this, then that

Loops: doing a thing many times

Truthiness — Python's clever shortcut

Mini-exercise: FizzBuzz

Questions are best handled with a grown-up here.

Keep going