iswlower Function

Test for a lowercase alphabetic wide character.

Attention: This function is implemented only by MPLAB XC32 C compilers.




int iswlower(wint_t wc);


The wide character to test.

Return Value

Returns a non-zero integer value if the wide character, wc, is a lowercase alphabetic wide character; otherwise, returns a zero.


A wide character is considered to be a lowercase wide character if it is in the range of L'a'-L'z'


See the notes at the beginning of this chapter or section for information on using printf() or scanf() (and other functions reading and writing the stdin or stdout streams) in the example code.

#include <wctype.h>
#include <stdio.h>
#include <stdbool.h>

int main(void)
  wint_t wStr[] = L"A string, 2 wide 4 some.\n";
  wint_t wc;
  unsigned idx = 0;
  bool found = false;

  do {
    wc = wStr[idx];
    if(iswlower(wc)) {
      if( ! found)
        printf("Found matching wide char at position: ");
      printf("%s%u", found ? ", " : "", idx);
      found = true;
  } while(wStr[idx]);

Example Output

Found matching wide char at position: 2, 3, 4, 5, 6, 7, 12, 13, 14, 15, 19, 20, 21, 22