islower


function template
<locale> 
template <class charT>
  bool islower ( charT c, const locale& loc );

Check if character is a lowercase letter using locale

Checks whether c is a lowercase letter using ctype facet of locale loc, returning the same as a call to:

  
use_facet < ctype<charT> > (loc).is (ctype_base::lower, c)


This function replicates the functionality of its C-library equivalent islower. See islower for more info.

Parameters

c
Character to be checked.
loc
Locale to be used. Shall have facet ctype present.


Template parameter charT is the character type.

Return Value

true if indeed c is a lowercase letter, false otherwise.

Example

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// islower example (C++)
#include <iostream>
#include <string>
#include <locale>
using namespace std;

int main ()
{
  locale loc;
  string str="Test String.\n";
  char c;
  for (size_t i=0; i<str.length(); ++i)
  {
    c=str[i];
    if (islower(c,loc)) c=toupper(c,loc);
    cout << c;
  }
  return 0;
}


Output:
TEST STRING.


See also

ctype Character type facet (class template)
islower (cctype) Check if character is lowercase letter (function)
isupper Check if character is an uppercase letter using locale (function template)
isalpha Check if character is alphabetic using locale (function template)
toupper Convert lowercase letter to uppercase using locale (function template)
tolower Convert uppercase letter to lowercase using locale (function template)