wcslen() function in C++ with Examples

The wcslen() function is defined in cwchar.h header file. The function wcslen() function returns the length of the given wide string. 

Syntax:

size_t wcslen(const wchar_t* str);

Parameter: This method takes a single parameter str which represents the pointer to the wide string whose length is to be calculated. 

Return Value: This function returns the length of wide string.

Time Complexity: O(1)
Auxiliary Space: O(1)

Below programs illustrate the above function:- 

Example 1:-

cpp

// c++ program to demonstrate
// example of wcslen() function.

#include <bits/stdc++.h>
using namespace std;

int main()
{

    // Get the string to be used
    wchar_t str[] = L"geeks";

    // Get the length of the string using wcslen()
    wcout << L"The length of '" << str
        << L"' is =" << wcslen(str) << endl;

    return 0;
}

Output:

The length of 'geeks' is =5

Example 2:-

cpp

// c++ program to demonstrate
// example of wcslen() function.

#include <bits/stdc++.h>
using namespace std;

int main()
{

    // Get the string to be used
    wchar_t str[] = L"A computer science portal for geeks";

    // Get the length of the string using wcslen()
    wcout << L"The length of '" << str
        << L"' is =" << wcslen(str) << endl;

    return 0;
}

Output:

The length of 'A computer science portal for geeks' is =35