**`wprintf()`** is a built-in function defined in the `<wchar.h>` header.

The following is the function prototype:

```C
int wprintf (const wchar_t* format, ...);
```

# Functionality

`wprintf()` is used to write the wide-character string (pointed to by `format`) to the *standard-output* (`stdout`).

The functionality of `wprintf()` is similar to the `printf()` function defined in the `<stdio.h>` header.

Relevant placeholders replace the *format specifiers* within the `format` string. These placeholders are passed as additional arguments represented by `...` in the prototype. 

#include <stdio.h>
#include <wchar.h>
#include <stddef.h>

int main(){

  //Example 1: %ls -> long string
  wchar_t str[] = L"Hello World!";
  wprintf(L"Message: %ls\n", str);

  //Example 2: %d -> int
  wint_t num = 1133;
  wprintf(L"The number is: %d\n", num);

  //Example 3: %lc -> long char
  wchar_t myChar = 'K';
  wprintf(L"The char is: %lc", myChar);


  return 0;
}

In the above example, we use `wprintf()` to print wide character strings.

We use three different format specifiers depending on the type of additional argument passed to `wprintf()`. 

>To declare a *wide-character string*, we prefix the string with the letter `L`.

What is wprintf() in C?

wprintf(), in the <wchar.h> header, writes wide-character strings to stdout, similar to printf().

What is wprintf() in C?

Functionality

Code