To document longer scripts, comments can be inserted into the script. Comments are not interpreted by the script engine and are only addressed to the human reader of the script.
A comment either starts with // and ends at the end of the line, or is enclosed in the characters /* and */:
// A function adding three to it's input
x -> $x + 3
/* A function adding three to it's input */
x /* The model of the component */ -> $x + 3