| Linux / Unix Command: toupper |
NAME
toupper, tolower - convert letter to upper or lower caseSYNOPSIS
#include <ctype.h> int toupper(int c); int tolower(int c);
DESCRIPTION
toupper() converts the letter c to upper case, if possible.tolower() converts the letter c to lower case, if possible.
If c is not an unsigned char value, or EOF, the behaviour of these functions is undefined.
RETURN VALUE
The value returned is that of the converted letter, or c if the conversion was not possible.CONFORMING TO
ANSI C, BSD 4.3SEE ALSO
isalpha(3), setlocale(3), locale(7)
Important: Use the man command (% man) to see how a command is used on your particular computer.
