towlower(), towupper()

Converts alphabetic wide characters to lowercase or uppercase.

  #include <ctype.h> 
  wint_t towlower(wint_t c); 
  wint_t towupper(wint_t c);

Parameter

c

A wide-character value to convert.

Remarks

The towlower() function converts an uppercase alphabetic character to its equivalent lowercase character. It returns all other characters unchanged. The towupper() function converts a lowercase alphabetic character to its uppercase equivalent. It returns all other characters unchanged.