). A common trick is checking if the sum of the row and column indices is even: (i + j) % 2 == 0 # Top 3 rows and Bottom 3 rows only : board[i][j] = # This is the "assignment statement" it wants! Use code with caution. Copied to clipboard 3. Print the Result Finally, call the provided print_board(board) function to display your work. Why This Version Works Nested Loops: It proves you can navigate a 2D data structure. board[i][j]
: Calculate x and y coordinates within the inner loop using current row and column indices:
Do you need the specific Python code snippet for the checkerboard function? post_content
x += SIZE # FIX: Decrement col_count col_count -= 1
function is defined outside your main loop to avoid scope issues. Incorrect Indexing : The middle rows (index 3 and 4) must remain . Your loop conditions should only target rows Step-by-Step Implementation Initialize the Grid list of lists filled entirely with ): my_grid.append([ Use code with caution. Copied to clipboard Use Nested Loops to Assign Values
Karel always starts facing East at (1,1) .
If you would like to create checkerboard you may use following code:
Key line: if (row + col) % 2 == 0 — this creates the perfect alternating pattern.
Let's break down the fixed code:
For those who are new to CodeHS or haven't encountered this problem before, let's start with the basics. The 916 Checkerboard V1 problem is a coding challenge on CodeHS, a popular platform for learning computer science and programming. The problem requires students to create a checkerboard pattern using a 2D array and nested loops.