print_board(my_grid)
for _ in range(2): my_grid.append([0] * 8)
public class CheckerboardV2 extends GraphicsProgram
: Ensure your loops run exactly range(8) to match the 8x8 requirement.
public void run() // Create an ArrayList of ArrayLists (2D ArrayList) ArrayList<ArrayList<Color>> board = new ArrayList<>();
Let's walk through each part of the code to solidify your understanding:
To create the checkerboard pattern, an element should be a 1 if the sum of its row and column indices is even (or odd, depending on the desired starting color). Use the modulus operator to check this condition: if (row + col) % 2 == 0: grid[row][col] = 1 Use code with caution. Copied to clipboard : Sets the element to 1 . Odd sum (row + col) : Leaves the element as 0 . 4. Print the Result
This article provides a full breakdown of the problem, the logic behind the solution, the correct code answer, common mistakes, and how to truly understand the concepts so you can pass the autograder on the first try.
0 1 0 1 0 1 0 1 1 0 1 0 1 0 1 0 0 1 0 1 0 1 0 1 1 0 1 0 1 0 1 0 0 1 0 1 0 1 0 1 1 0 1 0 1 0 1 0 0 1 0 1 0 1 0 1 1 0 1 0 1 0 1 0 Use code with caution. Starts with 0, alternates ( Row 2: Starts with 1, alternates ( This pattern repeats for 8 rows. 9.1.7 Checkerboard v2 Solution (CodeHS Python)
If the task requires a perfect checkerboard pattern starting with a specific color in the top-left corner: Ensure this is set to [Color A] . Pattern Rule: For any cell is even, it is [Color A]; if is odd, it is [Color B].
for row in range(size): for col in range(size): if (row + col) % 2 == 0: set color1 else: set color2 draw cell at (row, col)
: Define the total number of rows and columns. Outer Loop : Iterate through each individual row ( r ).
Which (Java, JavaScript, Python) are you using?
First, an empty list my_grid is created to hold the final board. The variables rows and columns are defined to control its size. In the example, this creates a grid with 5 rows and 8 columns.
Would you like that kind of conceptual help instead of just the answer?
To successfully write the program, you must think of the canvas as a coordinate system
A standard 4x4 checkerboard output should look visually similar to this layout: Row 0: [ X ] [ O ] [ X ] [ O ] Row 1: [ O ] [ X ] [ O ] [ X ] Row 2: [ X ] [ O ] [ X ] [ O ] Row 3: [ O ] [ X ] [ O ] [ X ]