2D Array Question Java

Question

If I have a 2D array arr[rows][columns], how could I use arr.length to find size for rows and columns individually?

sje397 · Accepted Answer · 2010-10-04 04:42:14Z

9

arr.length

will be the number of rows

arr[x].length

will be the number of columns in row x.

answered Oct 4, 2010 at 4:42

sje397

41.9k9 gold badges90 silver badges106 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

codaddict · Accepted Answer · 2010-10-04 04:42:36Z

6

You can find the number of rows as:

arr.length

In Java all the rows need not have same number of elements. You can find the number of elements in the row i as:

arr[i].length

answered Oct 4, 2010 at 4:42

codaddict

457k83 gold badges501 silver badges537 bronze badges

Emil · Accepted Answer · 2010-10-04 04:44:38Z

4

Rows - arr.length
Columns -arr[rowNumber].length //Each row can have different number of elements

answered Oct 4, 2010 at 4:44

Emil

13.8k19 gold badges74 silver badges108 bronze badges