C Tutorial/wctype.h/iswlower
int iswlower(wint_t ch)
Function char Equivalent int iswlower(wint_t ch) islower()
#include <stdio.h>
#include <wctype.h>
int main(void)
{
int wc;
for (wc=0; wc <= 0xFF; wc++) {
printf("%3d", wc);
printf(" %#4x ", wc);
printf("%2s", iswlower(wc) ? "L" : " ");
putchar("\n");
}
}