A relational expression is a comparison between two values. The result is Boolean: true or false.

Note: for relational operators, when comparing Integer to Number, the Integer will first be converted to Number.

For example:

var x : Number = tonnage(current);
if (x > 20) {
   println("It is big");
}

Note that, unlike Java, == and != are value comparisons, not identity comparisons. So, the following will work:

def input : String = userInput();
if (input == "dabnabit") {
   println("Censored");
}