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      std::islower(std::locale)

      From cppreference.com
      <cpp‎ |locale
       
       
       
      Localization library
       
      Defined in header<locale>
      template<class CharT>
      bool islower( CharT ch,const locale& loc);

      Checks if the given character is classified as a lowercase alphabetic character by the given locale'sstd::ctype facet.

      Contents

      [edit]Parameters

      ch - character
      loc - locale

      [edit]Return value

      Returnstrue if the character is classified as lowercase,false otherwise.

      [edit]Possible implementation

      template<class CharT>bool islower(CharT ch,conststd::locale& loc){returnstd::use_facet<std::ctype<CharT>>(loc).is(std::ctype_base::lower, ch);}

      [edit]Example

      Demonstrates the use ofislower() with different locales (OS-specific).

      Run this code
      #include <iostream>#include <locale> int main(){constwchar_t c= L'\u03c0';// GREEK SMALL LETTER PI std::locale loc1("C");std::cout<<std::boolalpha<<"islower('π', C locale) returned "<<std::islower(c, loc1)<<'\n'<<"isupper('π', C locale) returned "<<std::isupper(c, loc1)<<'\n'; std::locale loc2("en_US.UTF8");std::cout<<"islower('π', Unicode locale) returned "<<std::islower(c, loc2)<<'\n'<<"isupper('π', Unicode locale) returned "<<std::isupper(c, loc2)<<'\n';}

      Possible output:

      islower('π', C locale) returned falseisupper('π', C locale) returned falseislower('π', Unicode locale) returned trueisupper('π', Unicode locale) returned false

      [edit]See also

      checks if a character is lowercase
      (function)[edit]
      checks if a wide character is lowercase
      (function)[edit]
      Retrieved from "https://en.cppreference.com/mwiki/index.php?title=cpp/locale/islower&oldid=160119"

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