Pal.java

Below is the syntax highlighted version of Pal.java from §1.3 Conditionals and Loops.

/*************************************************************************
 *  Compilation:  javac Pal.java
 *  Execution:    java Pal N
 *  
 *  % java Pal 1
 *  11
 *
 *  % java Pal 2
 *  11211
 *
 *  % java Pal 3
 *  3112113
 *
 *  % java Pal 4
 *  311211343112113
 *
 *  % java Pal 5
 *  53112113431121135
 *
 *************************************************************************/


public class Pal {
    public static void main(String[] args) {
        int N = Integer.parseInt(args[0]);
        String s = "";
        for (int i = 1; i <= N; i++) {
             if (i % 2 == 0) s = s + i + s;
             else            s = i + s + i;
        }
        System.out.println(s);
    }
}