number logic program needed for id generation
<p>program to output <strong>all 4 digit numbers</strong> where no prior digit is greater than latter.</p>

<p>Numbers should be 1-9(including 1 &amp; 9).</p>

<p>Numbers can be like 1234,2345. First digit should be less than second, second should be less than third, third should be less than fourth.</p>
