ProgrammingBeginner

Kotlin

A concise, null-safe language for Android and the JVM.

Learn Kotlin syntax, null safety, collections, data classes, coroutines, Compose fundamentals and testing. The language behind modern Android and a strong choice for server work.

10 lessons 27 hours Certificate included Self-paced

Start the first lesson View curriculum

Reviewed and updated October 2026 · Free to start

What you will learn

By the end, you can do this.

Write null-safe idiomatic Kotlin
Model data with data classes and sealed types
Use coroutines for asynchronous work
Build a small Compose screen and test it

Curriculum

10 lessons in 1 module

290 practice drills included for extra repetition

0/10 complete

01Setup and syntaxRun Kotlin and learn val, var, types and string templates. Challenge 12 min 02Null safetyUse nullable types, safe calls, Elvis and smart casts. Challenge 13 min 03Functions and lambdasUse default arguments, named arguments and higher-order functions. Challenge 12 min 04CollectionsWork with lists, sets, maps and functional operations. Challenge 13 min 05Classes and data classesModel data with data classes, sealed types and properties. Challenge 13 min 06CoroutinesWrite asynchronous code sequentially with suspend functions. Challenge 15 min 07Android with ComposeBuild a small screen with composable functions and state. Challenge 14 min 08TestingTest pure logic with JUnit and coroutines with runTest. Challenge 13 min 09Gradle and project structureUnderstand the build file, dependencies and modules. Challenge 13 min 10Build a small clientFetch JSON, model it with data classes and render it with states. Challenge 22 min

Certification

Finish the course. Prove the skill.

Complete every lesson, then pass a timed assessment to earn the Kotlin Certificate. Each credential has a unique ID and a QR code that resolves to a live public record.

10 randomized questions
30 minute limit · 80% to pass
3 attempts per enrolment
Verifiable by QR or credential ID

Certification details Verify a credential

Pro members get five certification attempts and unlimited timed mock exams. Compare Pro

EduByte.tech

EduByte · Skills certificationIssued 26 Oct 2026

This certifies that

Your name

has successfully completed the assessed program

Kotlin

Write null-safe idiomatic KotlinModel data with data classes and sealed typesUse coroutines for asynchronous work

Kotlin

By the end, you can do this.

10 lessons in 1 module

Finish the course. Prove the skill.

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