The iswupper() function is defined in <cwctype> header file.
iswupper() prototype
int iswupper(wint_t ch);
The iswupper() function checks if ch is a uppercase character i.e one of the following:
A,B,C,D,E,F,G,H,I,J,K,L,M,N,O,P,Q,R,S,T,U,V,W,X,Y,Z.
iswupper() Parameters
- ch: The wide character to check.
iswupper() Return value
- The iswupper() function returns non zero value if ch is an uppercase character.
- It returns zero if ch is not an uppercase character.
Example: How iswupper() function works?
#include <cwctype>
#include <iostream>
#include <clocale>
using namespace std;
int main()
{
setlocale(LC_ALL, "en_US.UTF-8");
wchar_t ch1 = L'\u03a0';
wchar_t ch2 = L'\u03c0';
wcout << L"iswupper(" << ch1 << ") returned " << boolalpha << (bool)iswupper(ch1) << endl;
wcout << L"iswupper(" << ch2 << ") returned " << boolalpha << (bool)iswupper(ch2) << endl;
return 0;
}
When you run the program, the output will be:
iswupper(Π) returned true iswupper(π) returned false