Back to Lessons
Beginner

Replace a letter: green field

In 'green field', replace every 'a' with 'o' and print the result.

Part of CodeAscent Premium

Your first 10 lessons are free. Unlock every beginner, intermediate, and advanced lesson — and keep your streak going — with a subscription. Start with a 7-day free trial.

$4.99/month or $39.99/year after trial. Cancel anytime.