For more in-depth coding tutorials, check out the CodeHS documentation or explore advanced Karel challenges. If you are still having trouble, let me know: Is your Karel getting stuck at the top? Are your rows alternating correctly? Are you receiving a specific error message? Share public link
. This ensures that adjacent cells never have the same value, creating the classic checkerboard look. 4. Print the Result Finally, pass your populated list to the provided print_board function to visualize the grid in the console. Example Solution Code
To successfully complete this exercise, you must understand the following Python concepts:
: Some variations or autograders may require initializing the board with 0s first and then using nested loops to selectively assign to specific indices (e.g., board[i][j] = 1 Autograder Requirements : To pass all tests on , ensure you are using assignment statements 9.1.6 checkerboard v1 codehs
To touch every single square on the board, you need two loops. The outer loop iterates through the ( ), and the inner loop iterates through the columns ( ) for each of those rows. 3. Apply Alternating Logic
Do you need to add specialized features like or moving game pieces ? Share public link
# Pass this function a list of lists to print it as a grid def print_board ( board ): for i in range(len(board)): print( " " .join([str(x) for x in board[i]])) # 1. Start with an empty board and fill it with 0s board = [] for i in range( 8 ): board.append([ 0 ] * 8 ) # 2. Use nested loops to change 0s to 1s in the correct rows for i in range( 8 ): for j in range( 8 ): # Top 3 rows (0, 1, 2) and bottom 3 rows (5, 6, 7) if i < 3 or i > 4 : board[i][j] = 1 # 3. Print the final result print_board(board) Use code with caution. Copied to clipboard For more in-depth coding tutorials, check out the
After you've built a full row of 8 numbers, you append that row (as a list) to your main board list.
The core task is to generate an 8x8 grid using nested loops in Python. Here’s how to think through the solution:
Use a loop to append lists of eight zeros to an empty master list. board = [] for i in range(8): board.append([0] * 8) Use code with caution. Copied to clipboard Are you receiving a specific error message
What are you currently seeing?
The objective is to create a grid of alternating colored squares (usually black and white) resembling a classic checkerboard.
