# Create an 8x8 grid filled with 0s board = [] for i in range(8): board.append([0] * 8) # Populate the board with a checkerboard pattern for i in range(8): for j in range(8): # The logic: if the sum of indices is even, set it to 1 if (i + j) % 2 == 0: board[i][j] = 1 else: board[i][j] = 0 # Print the board in the required format for row in board: print(row) Use code with caution. 5. Troubleshooting Common Mistakes
board, you only need to change these two variables rather than hunting through your loops. The Nested Loop Architecture
: Create a function to display the board nicely, joining the numbers with spaces.
// Nested loops to iterate through the 2D array for(int row = 0; row < size; row++) 9.1.6 checkerboard v1 codehs
The line if ((r + c) % 2 === 0) uses the modulo operator to see if there is a remainder when dividing by 2.
Alternatively, if you want a more visual representation:
var SQUARES_PER_ROW = 8; var squareSize = getWidth() / SQUARES_PER_ROW; Use code with caution. 2. Nested Loops for the Grid # Create an 8x8 grid filled with 0s
function start() // Define the size of the board var NUM_ROWS = 8; var NUM_COLS = 8; // Outer loop handles the rows for (var row = 0; row < NUM_ROWS; row++) // Inner loop handles the columns for (var col = 0; col < NUM_COLS; col++) // Check if the sum of row and col is even if ((row + col) % 2 == 0) drawSquare(row, col, Color.red); else drawSquare(row, col, Color.black); function drawSquare(row, col, color) var sideLength = getWidth() / 8; var x = col * sideLength; var y = row * sideLength; var rect = new Rectangle(sideLength, sideLength); rect.setPosition(x, y); rect.setColor(color); add(rect); Use code with caution. Key Components Explained 1. Nested Loops
Output:
: Create an 8x8 grid (list of lists) representing a game board. Specific Pattern top 3 rows bottom 3 rows should contain 1s. middle 2 rows should contain only 0s. Output Requirement : Use a provided print_board function to display the grid in a human-readable format. Key Logical Steps Initialize the Board : Create an empty list, typically named Fill the Top Rows The Nested Loop Architecture : Create a function
Complexity analysis:
board = []
Students new to coding can sometimes get stuck on this exercise. Here are the most common mistakes and how to fix them: