By following this simple math, the apprentices completed the floor perfectly, ensuring no two tiles of the same color ever touched vertically or horizontally. The "Logic" Behind the Story
// After finishing a row, toggle the starting color for the next row // Since we toggled an odd number of times (8 toggles), // the boolean is already opposite of row start. // But careful: after even number of columns, toggling 8 times // brings us back to original state. So we must toggle once more // to alternate row starting color. if (COLS % 2 == 0) isBlack = !isBlack;
Once my_grid is constructed, the final step is to pass it to the provided print_board function to visualize your work and complete the program:
If your specific CodeHS framework requires you to append pre-arranged logic chains directly into the grid matrix container, you can check row parity using individual row-tracking loops. 9.1.7 Checkerboard V2 Codehs
Here is the correct Python code using the Turtle module to solve this problem.
: To get the alternating pattern, we check if the sum of the current row and column indices is even ( (i + j) % 2 == 0 ). If it is, we assign that spot a Example: At board[0][0] (even), so it becomes board[0][1] (odd), so it stays print_board
Before coding, it's crucial to understand the pattern you need to create. For a standard 8x8 board, the pattern of the first few rows looks like this: By following this simple math, the apprentices completed
Ensure you're actually using an if statement to check positions 1.2.4.
If (row + col) % 2 == 0 , the cell gets one designated value (e.g., 1, or a specific color).
This single line of code will display your checkerboard pattern in the console, formatted exactly as required. The full, completed Python program is concise and elegant: So we must toggle once more // to
coordinates for the first few cells, and then apply the math to your code.
A 2D list is essentially a list containing other lists. It tracks coordinates through standard [row][column] indexing syntax. : Accesses the entirety of the first horizontal row.