This program will create small, snake-like increment tables, up to 9x9 in size. It starts from 1, and the value keep increasing by one. For the first row, it increase from left to right; for the second row, it increase from right to left; the third row, from left to right, ... , etc.　Just like a snake.
Sample output is below:
>java SnakeTable
Enter table size 1-9, 0 to exit: 3
　　 1　　 2　　 3
　　 6　　 5　　 4
　　 7　　 8　　 9