Ordinals

selectordinal picks a form based on CLDR ordinal rules — try switching locale.

Playground

Place

1st

Series

1 → 1st
2 → 2nd
3 → 3rd
4 → 4th
11 → 11th
21 → 21st
22 → 22nd
23 → 23rd

Rules vary: English splits one/two/few (1st, 2nd, 3rd, 4th), French collapses almost everything to "e" (except "1er").