I want print this sequence output in description how can do this?

Question

1
23
456
789

Answer 1

Satyam Mishra , it might be helpful if you could give us a clear description of what your code is going to do. Plaese provide also sample data for input and output. Thanks!

Answer 2

Why the 4th row has only 3 numbers listed? isn't there supposedly 4 numbers? I don't get the pattern ...