The iswdigit() function is defined in <cwctype> header file.
iswdigit() prototype
int iswdigit(wint_t ch);
The iswalnum() function checks if ch is a digit or not. The characters from 0 to 9 i.e. 0,1,2,3,4,5,6,7,8,9 are classified as digits.
iswdigit() Parameters
- ch: The wide character to check.
iswdigit() Return value
- The iswdigit() function returns non zero value if ch is a digit.otherwise returns zero.
- It returns zero if ch is not a digit.
Example: How iswdigit() function works?
#include <cwctype>
#include <iostream>
#include <cwchar>
#include <clocale>
using namespace std;
int main()
{
setlocale(LC_ALL, "en_US.UTF-8");
wchar_t str[] = L"\u20b9\u0967\u0966 = Rs.10";
wcout << L"The digit in the string \"" << str << L"\" are :" << endl;
for (int i=0; i<wcslen(str); i++)
{
if (iswdigit(str[i]))
wcout << str[i] << " ";
}
return 0;
}
When you run the program, the output will be:
The digit in the string "₹१० = Rs.10" are : 1 0