isgraph

isdigit

#include <ctype.h>int isdigit(int ch);

The isdigit( ) function returns nonzero if ch is a digit—that is, 0 through 9. Otherwise, zero is returned.

Related functions are isalnum( ), isalpha( ), iscntrl( ), isgraph( ), isprint( ), ispunct( ), and isspace( ).




C(s)C++ Programmer's Reference
C Programming on the IBM PC (C Programmers Reference Guide Series)
ISBN: 0673462897
EAN: 2147483647
Year: 2002
Pages: 539

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