OpalOPAL (OPtimized Applicative Language) is a functional programming language first developed at the Technical University of Berlin.The most used programming languages JavaScript PowerShell Dart Rust Fortran Julia Java OCaml Scala WebAssembly Lean (proof … Erlang CoffeeScript Clojure Haskell Smalltalk C Go Swift Lua TypeScript Elixir Objective-C F Sharp C++ Visual Basic … Python PHP C Sharp