Kotlin is a general-purpose programming language which interoperates fully with Java. Kotlin's JVM version of its standard library depends on the Java Class Library, hence this tutorial will first show the reader how to install Java SDK and then a Kotlin compiler on Ubuntu 20.04.
This is a companion discussion topic for the original entry at https://linuxconfig.org/how-to-install-kotlin-on-ubuntu-20-04-focal-fossa-linux