islower()

Library:  Localization

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Locale convenience function that determines whether a character is lower case

#include <locale>

namespace std {
  template <class charT> 
  bool islower(charT c, const locale& loc);
}

The islower() function returns true if the character passed as a parameter is lower case. Otherwise, the function returns false. The check is made using the ctype facet from the locale parameter.

ctype, locale, isalnum(), isalpha(), iscntrl(), isdigit(), isgraph(), isprint(), ispunct(), isspace(), isupper(), isxdigit()

ISO/IEC 14882:1998 -- International Standard for Information Systems -- Programming Language C++, Section 22.1.3.1