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UNIQUE NUMBER

PROGRAM : UNIQUE NUMBER

A Number is Said to be unique if
1- it do not start with 0.
2- it do not have any repeating digit.

for example:
0112 is not a unique no.                         1234 is a unique no. 

SYNTAX:


 import java.io.*;
class unique_num
{
    public static void main(String args[])throws IOException
    {
        BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
        String s;int val=0;
        System.out.println("Enter a Number");
        s=br.readLine();
        if(s.charAt(0)=='0')
        System.out.println("**** The Number is Not a Unique Number ****");
        else
        {
            for(int i=0;i<s.length();i++)
        {
            for(int j=i+1;j<s.length();j++)
            {
                if(s.charAt(i)==s.charAt(j)) //if any digits match, then we know it is not a Unique Number
                {
                    val=1;
                    break;
                }
            }
        }

        if(val==0)
        System.out.println("**** The Number is a Unique Number ****");
        else
        System.out.println("**** The Number is Not a Unique Number ****");

    }
}}
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