Template:LSL Function/negative index/range

Index	Positive	Negative
First	0	-length
Last	length - 1	-1

Mentally first translate any negative indexes into positive indexes

If {{{1}}} <= {{{2}}} then the range operated on starts at {{{1}}} and ends at {{{2}}}. [{{{1}}}, {{{2}}}] If {{{1}}} > {{{2}}} then the range operated on starts at 0 and goes to {{{2}}} and then starts again at {{{1}}} and goes to -1. [0, {{{2}}}] + [{{{1}}}, -1]

See negative indexes for more information.