to-report

to-report procedure-name to-report procedure-name [input1 ...]

Used to begin a reporter procedure.

The body of the procedure should use report to report a value for the procedure. See report.

to-report average [a b]
  report (a + b) / 2
end

to-report absolute-value [number]
  ifelse number >= 0
    [ report number ]
    [ report (- number) ]
end

to-report first-turtle?
  report who = 0  ;; reports true or false
end