how to find length of character array in c++

To find the length of a character array in C++, you can use the strlen function from the C standard library. Here are the steps to do it:

1. Include the <cstring> header file at the beginning of your code to access the strlen function.
2. Declare a character array and assign it a value.
3. Use the strlen function to find the length of the character array.
4. Store the result in a variable.
5. Print the length of the character array.

Here is an example that demonstrates these steps:

#include <iostream>
#include <cstring>

int main() {
    char arr[] = "Hello, World!"; // Step 2

    int length = strlen(arr); // Step 3

    std::cout << "Length of the character array: " << length << std::endl; // Step 5

    return 0;
}

In this example, the character array arr is assigned the value "Hello, World!". The strlen function is then used to find the length of arr, and the result is stored in the variable length. Finally, the length is printed to the console using std::cout.

The output of this example will be:

Length of the character array: 13

This indicates that the character array arr has a length of 13 characters, including the null terminator.