The **`wcsrchr`** function is used to locate the last occurrence of a wide character in a wide string. It is defined in the `wchar.h` header.



# Parameters
```C
wchar_t* wcsrchr (wchar_t* str, wchar_t ch);
```

The function takes two parameters of type `wchar_t`. 

In the above snippet of code, `ch` is a wide character that will be searched in the wide string pointed by `str`. 

# Return Value
If `ch` is found in `str`, the function returns a pointer to its last occurrence. If `ch` is not found, the function returns `NULL`.

# Example

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

void main() {
  
  // declaring and initializing wide string
  wchar_t str1[] = L"HELLO WORLD.";
  
  // calling the function
  wchar_t* ptr = wcsrchr(str1, L'O');

  if(ptr == NULL) {
    wprintf(L"Character not found! \n");
  }
  else {
    // using the wprintf function to print the wide string
    wprintf(L"RESULT: \n");
    wprintf(L"ptr = %ls\n\n", ptr);
  }
}

In the above snippet of code, we're searching the last occurrence of 'O' in `str1`.

We can see from the output of the code that the function returned the last occurrence of 'O'.

What is wcsrchr in C?

The wcsrchr function locates the last occurrence of a wide character in a wide string, returning a pointer or NULL if not found.