number of characters in string

#include <iostream>
#include <string>

int main() {
    std::string str;
    std::cout << "Enter a string: ";
    std::getline(std::cin, str);

    int count = 0;
    for (int i = 0; str[i] != '\0'; ++i) {
        ++count;
    }

    std::cout << "Number of characters in the string: " << count << std::endl;

    return 0;
}