Determines whether a character is digit (0-9). Unlike the standard C library isdigit() function, this takes a char, not an int, so don't call it on EOF, but no need to cast to guchar before passing a possibly non-ASCII character in.
any character
TRUE if c is an ASCII digit.
See Implementation
Determines whether a character is digit (0-9). Unlike the standard C library isdigit() function, this takes a char, not an int, so don't call it on EOF, but no need to cast to guchar before passing a possibly non-ASCII character in.