OpalOPAL (OPtimized Applicative Language) is a functional programming language first developed at the Technical University of Berlin.The most used programming languages Kotlin Objective-C Swift Vim (text … Emacs Lisp Haskell C Sharp Java Erlang Dart C++ PowerShell C Rust Apache Groovy Visual Basic … Scala Lua Go Julia R JavaScript PHP OCaml F Sharp Clojure Perl WebAssembly TypeScript