Is Kotlin 2.0 supported?

Kotlin 2.0 (JVM)

Online Kotlin Compiler

Modern, concise Kotlin programming playground with null safety and JVM execution. Write code with auto-formatting, test with standard input (stdin), and inspect terminal output in real-time.

✓ Null safety and type inference✓ Data classes and sealed interfaces✓ Extension functions✓ readLine standard input

main.kt

Kotlin 2.0 (JVM)

13px

Standard Input (stdin)

Passed to scanf, input(), cin, etc.

UTF-8Kotlin2 SpacesWrap: Off

Ctrl+Enter to Run

Ln 1, Col 121 lines528 chars

Output & ConsoleIdle

Ready to Compile & Run

Click the blue ▶ Run button in the header bar or press Ctrl + Enter to compile and execute your Online Kotlin Compiler.

How to Run Kotlin Code Online

Compile and run concise Kotlin code targeting modern JVM runtime.

Write fun main(), press "▶ Run", and view output.

Common Errors & Troubleshooting

Encountering compilation or runtime diagnostics? Check these common scenarios:

Null can not be a value of a non-null typeUse nullable types (Type?) if null is possible.

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Frequently Asked Questions (Kotlin)

Yes, compiles with the latest Kotlin 2.0 K2 compiler.