Identifiers

An identifier is a name that you can use to define a class, field, a function or variable.

An identifier must follows all the below rules

• it must start with a letter ('a' to 'z' , and 'A' to 'Z'), or an underscore
• the following characters can be a letter, an underscore or a number

Class identifiers

To reference a class, you need tp add the .class suffix, like in Java. But note that you can only reference simple name of classes, this means that you need to import it first.

import java.util.concurrent.Callable
println(Callable.class)

println(Object.class)