C Programming/wctype.h/iswdigit
iswdigit is a function in included in the C Standard Library header wctype.h. It checks if a wide character is a decimal digit in the current locale (always includes '0' to '9'). The iswdigit function is a wide charactered version of isdigit function.
Syntax
editint iswdigit(wint_t wc);
Return value
editThe iswdigit function return non zero value if its argument is a digit between 0 to 9. In other cases, a zero value because of its independent working.
Example
edit#include <stdio.h>
#include <wctype.h>
int main(void) {
for (unsigned i = 0; i < 0xff; i++) {
printf("%x, %s\n", i, iswdigit(i) ? "digit" : "not a digit");
}
return 0;
}