function
boot.janet on line 357, column 1
(return to &opt value)
Return to a prompt point.
(print
(prompt :a
(for i 0 1000000000000
(print (string "i=" i))
(if (= i 2)
(return :a 10)))))
# output:
# i=0
# i=1
# i=2
# 10