store string length in a variable c++ code example

Example 1: c++ string size

// C++ string size
str.length();
str.size();			// synonym

Example 2: create a string of length c++

#include <string>
#include <iostream>

int main()
{
    std::string s(21, '*');

    std::cout << s << std::endl;

    return 0;
}