All numbers that are NOT in an array under 1000
<p>I've got this programming problem.</p>

<p>I have number for example 1000.</p>

<p>Now I have a number in an array, like 999.</p>

<p>Now I need to display all numbers that are NOT in the array but are 1 to 1000;</p>

<p>The next requirement is essential:
It has to be displayed in a way that it's easy to oversee.</p>

<p>So I was thinking, lets show:<pre>
100
200
300
400
500
600
700
800
900
910
920
930
940
950
960
970
980
990
991
992
993
994
995
996
997
998
1000</pre></p>

<p>What is the best way to start programming this?</p>
