Control Flow & Functions — quiz

Your test selects a browser based on an env var: 'chrome', 'firefox', or 'webkit'. Anything else should raise an error. Which structure is most readable?

• A chain of nested ifs with no elif and no else
• An if/elif/elif/else chain that raises a ValueError in the else branch
• Three separate if statements (no else) that each set the browser variable
• A try/except wrapping the env var read