A 2D array is essentially an array of arrays. In Java or JavaScript (the primary languages used in CodeHS), the first index typically represents the row , and the second index represents the column .
Use print(board) inside your loop to see how it's being built.
To create a checkerboard, a cell should be a 1 if the sum of its row and column indices is even (or odd, depending on your starting preference). : Assign 1 . Odd sum : Assign 0 . Step-by-Step Implementation
After configuring the object, always call add(object) in graphics programs. 9.1.7 Checkerboard V2 Codehs
What or failing test case is CodeHS showing?
In , the goal is to create a pattern of alternating 1s and 0s in a 2D list (grid). Unlike version 1, which often uses simple row filling, version 2 requires you to use nested for loops and the modulus operator ( ) to check for even and odd positions. Logic for the Pattern
Example pattern (B = black, W = white):
The 9.1.7 Checkerboard V2 Codehs problem is a fun and challenging coding challenge that requires students to think creatively and use problem-solving skills. By following the steps outlined in this article, you should be able to create a fully functional checkerboard with alternating black and white squares. Whether you're a student or a teacher, we hope this guide has been helpful in unlocking the secrets of the 9.1.7 Checkerboard V2 Codehs problem. Happy coding!
For example, in a simple implementation:
// Determine color using the alternating pattern if ((row + col) % 2 === 0) square.setColor(COLOR_A); else square.setColor(COLOR_B); A 2D array is essentially an array of arrays
for i in range(8): for j in range(8): if (i + j) % 2 == 0: board[i][j] = 1 Use code with caution. Copied to clipboard
Do not just print the lists manually. The autograder looks for the use of the board[i][j] = 1 assignment statement.
A checkerboard relies on alternation. If you look at a chessboard, the top-left square is light, the next is dark, and the pattern repeats. Crucially, the pattern also offsets with each new row. The Mathematical Secret: Row + Column To create a checkerboard, a cell should be