public class CharMath {
  public static void main(String []args) {
    char c1 = 'a';
    char c2 = 'b';

    if (c1 < c2) {
      System.out.println("less");
    } else {
      System.out.println("not less");
    }

    if ('A' > 'B') {
      System.out.println("greater");
    } else {
      System.out.println("not greater");
    }

    c1++;
    System.out.println(c1);

    c1++;
    System.out.println(c1);

    c1 += 5;
    System.out.println(c1);

    if ('a' < 'Z') {
      System.out.println("less");
    } else {
      System.out.println("not less");
    }

    for (char c = 'a'; c <= 'z'; c++) {
      System.out.print(c);
    }

    for (char c = 'a'; c <= 'z'; c++) {
      System.out.println(c + "->" + (int)c);
    }
  }
}