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C++ Programming/Code/Standard C Library/Functions/isxdigit
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isxdigit
#include <cctype>
int isxdigit( int ch );
The function isxdigit() returns non-zero if its argument is a hexadecimal digit (i.e. A-F, a-f, or 0-9). Otherwise, zero is returned.
Related topics isalnum - isalpha - iscntrl - isdigit - isgraph - ispunct - isspace