Print Subsequence

 

package pep.Day10;

public class 
Print_Subsequence {
    public static void main(String[] args) {

        String str = "abc";

        printSubsequence(str, "");
    }

    private static void printSubsequence(String str, String ans) {
        if (str.length() == 0) {
            System.out.println(ans);
            return;
        }
        printSubsequence(str.substring(1), ans + "");
        printSubsequence(str.substring(1), ans + str.charAt(0));
    }
}