REFAL is a general-purpose, multi-paradigm programming language created in the 1960s. It is based on the idea of functional programming, but also supports procedural, object-oriented, and logical programming paradigms. It was designed with the intention of being easy to learn and use, and its syntax is similar to that of other ALGOL-based languages.
REFAL has a number of features that make it unique among programming languages. Perhaps most notably, it uses a "pattern matching" system for its variables, which allows for more concise and efficient code. It also has a built-in garbage collector, which helps manage memory usage.
Despite its many features, REFAL has not been widely adopted outside of its native Russia. Nevertheless, it remains an interesting and powerful language that is worth learning for any programmer.