Thread: How to print?

Hi friend..

How to print following pattern in java?

11 12 13 14 15
7 8 9 10
4 5 6
2 3
1

please solve this?

I think it would be better if you have a 2 dimensional array.
1st element of array is array with single element: 1
2nd element of array is array with 2 elements: 2, 3
3rd element of array is array with 3 elements: 4, 5, 6
4th element of array is array with 4 elements: 7, 8, 9, 10
.
.
.
.
and so on

the number of elements in 2nd dimension increases by 1 from first element (1st 2nd dimension)
and you just need to have a counter to fill the 2nd dimension array

[ [1], [2,3], [4,5,6].....]

you just need a loop.

and when you print it, make sure to start at the last element of the first dimension array..
-sorry for my poor english

Yes there is no need to use 2 dimensional array for printing just

11 12 13 14 15
7 8 9 10
4 5 6
2 3
1

but what if the number of rows varies? Let say there is an input.
Let say the users in put is 10. meaning were are going to have 10 rows:
46 47 48 49 50 51 52 53 54 55
37 38 39 40 41 42 43 44 45
29 30 31 32 33 34 35 36
22 23 24 25 26 27 28
16 17 18 19 20 21
11 12 13 14 15
7 8 9 10
4 5 6
2 3
1

or the input is about 952? so there should be 952 rows.
That is the reason why I suggested 2 dimensional array so that he/she can stores the generated sequence.
Print just

11 12 13 14 15
7 8 9 10
4 5 6
2 3
1
is so easy, he/she could have done it hard coded. It will consist of 5 print statement (1 print statement will do also, provided a new line for String).

That why I assumed that there is a possibility that the number of rows can vary.

Originally Posted by dicdic

Yes there is no need to use 2 dimensional array for printing just

11 12 13 14 15
7 8 9 10
4 5 6
2 3
1

but what if the number of rows varies? Let say there is an input.
Let say the users in put is 10. meaning were are going to have 10 rows:
46 47 48 49 50 51 52 53 54 55
37 38 39 40 41 42 43 44 45
29 30 31 32 33 34 35 36
22 23 24 25 26 27 28
16 17 18 19 20 21
11 12 13 14 15
7 8 9 10
4 5 6
2 3
1

or the input is about 952? so there should be 952 rows.
That is the reason why I suggested 2 dimensional array so that he/she can stores the generated sequence.
Print just

11 12 13 14 15
7 8 9 10
4 5 6
2 3
1
is so easy, he/she could have done it hard coded. It will consist of 5 print statement (1 print statement will do also, provided a new line for String).

That why I assumed that there is a possibility that the number of rows can vary.

I know that, but the above program was just for 5 lines. For user input of lines, let us take the input and store it in variable m. Now, by your method, if user will input 952 or 2000, your program will have to make a 2D array of size 952*952=906304 or 2000*2000=4,000,000 i.e. a array of size 4 million!
My method is much simpler and will not require so much of space from the RAM. For m no. of lines, you just have to add this:-

 for(int i=0; i<m; i++)
 {for(int j=0; j<=i; j++)
  {n=r;
   r++;
  }
 }

where n stores anything initially (let it store 0) and r stores 1 initially (int r=1; ).

then replace 5 by m in the previous code given by me, i.e.

...

now it should satisfy you. Satisfied!

hi..i cant solve this problem..if i get code i feel good.