enum
Enum
!i
enum, a.k.a. til[1], range (from Python), iota (from APL), generates a list of integers between 0 and a given integer x.
!5 0 1 2 3 4
Dialects based on k6 support negative integers - the generated range in that case is between x and 0:
!-5 -5 -4 -3 -2 -1
Odometer is an extension of enum for int lists.