Java 2D array question

Question

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

Answer 1

 arr.length 

there will be a number of lines

 arr[x].length 

will be the number of columns in row x .

Answer 2

You can find the number of lines as:

 arr.length 

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

 arr[i].length 

Answer 3

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

Answer 4

arr.length This will give you the number of rows in your 2D array

arr[i].length This will give you the number of colonies of a particular line ....

Therefore, arr[i].length reduces the time it takes to use it in a loop ...

This means that if line 0 has 3 values ​​and line 1 has 2 values ​​...