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_tolower

Summary
#include <ctype.h>

int _tolower (
  int c);      /* character to convert */
Description

The _tolower routine is a macro version of tolower that may be used when c is known to be an uppercase character.

Return Value

The _tolower macro returns a lowercase character.

See Also

_toupper, tolower, toupper

Example
#include <ctype.h>

void test__tolower (char k) {
  if (isupper (k)) k = _tolower (k);
}
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