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Kotlin practice

0 exercises and 16 quizzes from the lessons of this track. Sample tests run in your browser; what you pass is kept in this browser only.

Start here: Kotlin 2.4 on the JVM

Quiz: What Kotlin is and where it runs Self-check · 12 questions
Quiz: Install Kotlin, a JDK and an editor Self-check · 12 questions
Quiz: Your first program with kotlinc and kotlinr Self-check · 8 questions
Quiz: A Gradle project for Kotlin from scratch Self-check · 10 questions
Quiz: Read compiler errors, warnings and opt-ins Self-check · 8 questions
Quiz: Kotlin scripts, the REPL and notebooks Self-check · 10 questions

Values, types and control flow

Quiz: val, var and type inference Self-check · 10 questions
Quiz: Numbers, conversions and overflow Self-check · 9 questions
Quiz: Strings, characters and string templates Self-check · 8 questions
Quiz: Parse text and format Indian numbers Self-check · 9 questions
Quiz: if and when expressions Self-check · 9 questions
Quiz: Loops, ranges and labelled jumps Self-check · 9 questions

Null safety

Quiz: Nullable types, safe calls and Elvis Self-check · 10 questions
Quiz: Smart casts, is checks and safe casts Self-check · 5 questions
Quiz: Nulls inside collections and generics Self-check · 6 questions
Quiz: Platform types and Java nullability Self-check · 5 questions

Results here are what this browser has checked: feedback for you, not proof. They stay on this device; your Learn progress can be exported to a file. · Back to the Kotlin track