Can i do this using a single loop?

[BablooDabloo]

how can i shyow this output using a single for loop?
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14
0 1 2 3 4 5 6 7 8 9 10 11 12

upto
0
it can be done with two nested loops but how can i do it using a single for loop? please help me with this...

[ddanbe]

Decrement the loop counter in your loop.

[stultuske]

yes. substring, lastIndexOf, that can help you out.

[jalpesh_007]

you can use while loop for your printing..and single for loop for your decrementing variable value...

hope this might be working....

[stultuske]

that is still two loops jalpesh.
In under two minutes I've written two working ways with a single loop to do this. so yes, it is possible.