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string-lower(1)

string-lower - convert strings to lowercase

STRING-LOWER(1) fish-shell STRING-LOWER(1)

string-lower - convert strings to lowercase

string lower [-q | --quiet] [STRING ...]

string lower converts each string argument to lowercase. Exit status: 0 if at least one string was converted to lowercase, else 1. This means that in conjunction with the -q flag you can readily test whether a string is already lowercase.

fish-shell developers

September 9, 2026 4.9

fish 4.9.3-r0 · os · ingested 2026-09-30