# Name TBD > i guess it's an embedded language? # Features Math: `+`, `-`, `*`, `/`, `%` Equality: `==`, `!=`, `>`, `<`, `>=`, `<=` Some basic types: String, char, int, float, bool Custom rust types: if it implements `CustomValue`, it can be used Functions: `foo(x)` Methods: `x.foo()` Any function is also a method, as long as it has at least one parameter. The same also works the other way around. Some control flow: `while` and `if/else if/else` Functions: can be defined in both the language and in Rust. The functions support a return in the form of `return x;` and `x` as the last element. As long as the final element is an expression of some kind, it will be seen as a return value in a function. For some sample code, check `test.foo` (extension also TBD)