println is a builtin function that can be used to write debug output.
The function accepts any number of arguments of any type.
The behavior of println is platform-specific.
Therefore, it should only be used for debugging, but it should never be part of shipped code.
println("Hello, two square is", 2 * 2)
println uses platform-specifc support libraries to print integers, floats etc.
It does not use the Fyr standard library.
When targeting C, println will use printf internally.
In the case of WebAssembly it could choose to call console.log.