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Why is the following code not plotting the set of points from {1,1} to {10,10} ?

For[i = 1, i <= 10, i++, Graphics[Point[{i, i}]]]
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Unless an explicit Return is used, the value returned by For is Null. – chuy Sep 11 '12 at 21:40

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up vote 4 down vote accepted 
Graphics[Table[Point[{i, i}], {i, 10}]]

If you want to see the output of your command, modify it a little:

For[i = 1, i <= 10, i++, Print@Framed@Graphics[Point[{i, i}]]]

You will see ten graphics, one point in each one

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also Graphics[Point@Table[{i, i}, {i, 10}]] – rm -rf♦ Sep 11 '12 at 21:41
what I am actually interested in is generating i random points (For seems like a good idea when a number of loop repetitions is known) and then plotting them. Could you give me a hint about this? – alex Sep 11 '12 at 21:45
@alex Put the loop (in Table form) inside the Graphics – Sjoerd C. de Vries Sep 11 '12 at 21:46
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@alex So something like: Graphics[Point@RandomReal[1, {100, 2}]]? – rm -rf♦ Sep 11 '12 at 21:47
I managed to make it work with something like: ListPlot[Table[{RandomReal[{startRange, endRange}], RandomReal[{min, max}]}, {pointsCount}]]. Thanks – alex Sep 11 '12 at 22:17

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