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Kotlin Multiplatform Academy · Lesson

Common Mistakes & Compiler Errors

Fix the typical 'no actual declaration' failures.

Errors Are Your Friend

expect/actual mistakes surface at compile time, never as silent runtime bugs. Learning the messages makes fixing them fast. 🛠️

No actual Declaration

The most common error is forgetting an actual for one target. The compiler says expected declaration has no actual for that platform.

All lessons in this course

  1. Why expect/actual Exists
  2. Get the Platform Name per Target
  3. expect/actual Classes & Properties
  4. Common Mistakes & Compiler Errors
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