toupper package:text-latin1

Map upper-case ASCII letters to the corresponding lower-case letters, leaving other characters as is.

Map upper-case Latin-1 letters to the corresponding lower-case letters, leaving other characters as is.

Map the encodings of upper-case ASCII letters to the encodings of the corresponding lower-case letters, leaving other bytes as is.

Map the encodings of upper-case Latin-1 letters to the encodings of the corresponding lower-case letters, leaving other bytes as is.