CBuilderLab· about 30 min· in the browser

Lab: your first Python functions

Write three small functions with if/elif/else and return values, and get all tests green.

Requires: Programming logic — variables, conditions, loops

Theory

A function takes values in, does something and returns an answer with return. The tests call your functions with different inputs and compare with the answer key — just like a real codebase.

Sub-tasks

betyg(poang) — grade — Return 'A' for 90 or more, 'B' for 75–89, otherwise 'C'.
moms(pris) — VAT — Return the VAT (25 %) on a price.
ar_jamnt(n) — is even — Return True if the number is even.

The starter code

runs in your browser

"""Skriv dina funktioner här. Kör testerna tills allt är grönt."""


def betyg(poang):
    # TODO: 'A' vid 90 eller mer, 'B' vid 75-89, annars 'C'
    ...


def moms(pris):
    # TODO: 25 % av priset
    ...


def ar_jamnt(n):
    # TODO: True om n är jämnt
    ...

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Expected results

All 6 tests green. betyg(90) → 'A', betyg(75) → 'B', betyg(74) → 'C'; moms(200) → 50.0; ar_jamnt(4) → True.

Common mistakes

Forgot return (the function returns None).
Wrong boundaries: >= 90, not > 90.
Writes print instead of return.