Standard C++ Library Reference ISO/IEC (VERSION3)

0 1 2 3 4 5 6 7 8 9 a b c d e f A B C D E F

tolower

int tolower(int c);

The function returns the corresponding lowercase letter if one exists and if isupper(c);

otherwise, it returns c.

toupper

int toupper(int c);

The function returns the corresponding uppercase letter if one exists and if islower(c);

otherwise, it returns c.

See also the Table of Contents and the Index.