Hack (Programming Language)

Hack is a programming language for the HipHop Virtual Machine (HHVM),which introduced by Facebook on March 20, 2014. Hack allows programmers to use both dynamic typing and static typing, which is also implemented in other programming languages such as ActionScript. It's open source & Licensed by MIT License. Hack has a very similar look and feel to PHP, which in turn, supports a lot of syntax shared by C, C++, C#, Java, and JavaScript. It's type system allows types to be specified for function arguments, function return values, and class properties; however, types of local variables are always inferred and cannot be specified.