package javaStudy;

public class StringMethodExam {

    public static void main(String[] args) {
        String str = "hello";
        System.out.println(str.length());
        System.out.println(str.concat(" world"));
        System.out.println(str);
        str = str.concat(" world");
        System.out.println(str);
        System.out.println(str.substring(3));
        System.out.println(str.substring(3, 6));
    }
}