This-all is actually not exactly about bash functions, but POSIX shell functions: https://pubs.opengroup.org/onlinepubs/9699919799/utilities/V3_chap02.html#tag_

This-all is actually not exactly about bash functions, but POSIX shell functions: https://pubs.opengroup.org/onlinepubs/9699919799/utilities/V3_chap02.html#tag_18_09_05 https://pubs.opengroup.org/onlinepubs/9699919799/utilities/V... `local` is not in POSIX, but is so common in "posix" shells that many use it, just a sidenote.