916 Checkerboard V1 Codehs Fixed _best_ 90%

# Loop through rows and columns to draw the checkerboard for row in range(8): for col in range(8): # Alternate between black and white squares if (row + col) % 2 == 0: fill_color = "white" else: fill_color = "black"

Once your 9.1.6 Checkerboard v1 is fixed and passing, try these extensions to deepen your understanding:

Beyond undefined variables, there are a few other common pitfalls:

By checking (row + col) % 2 == 0 , the code calculates the absolute state of the cell independently of the previous cell. It never loses track of the pattern. 4. Formatting the Output 916 checkerboard v1 codehs fixed

Before writing any code, it is crucial to understand the goal. The objective of the 9.1.6 Checkerboard, v1 assignment is to use two‑dimensional (2D) lists to create the initial setup of a checkerboard.

for row in board: print(' '.join(str(x) for x in row))

Often, the final row isn't filled if the while(leftIsClear()) condition fails too early. The fillRow() call after the main while loop fixes this. # Loop through rows and columns to draw

Using Python, you can test if a number is even by seeing if the remainder is 0 when divided by 2. The logic translates to this exact conditional expression:

public class Checkerboard extends ConsoleProgram public void run() // 1. Initialize a standard 8x8 2D array int[][] board = new int[8][8]; // 2. Use nested loops to traverse rows and columns for (int i = 0; i < board.length; i++) for (int j = 0; j < board[i].length; j++) // 3. Check if the sum of indices is even or odd if ((i + j) % 2 == 0) board[i][j] = 0; else board[i][j] = 1; // 4. Print the final grid layout printBoard(board); // Helper method to display the 2D array properly private void printBoard(int[][] array) for (int[] row : array) for (int element : row) System.out.print(element + " "); System.out.println(); Use code with caution. Step-by-Step Code Analysis

The goal is to generate a checkerboard pattern—a grid of alternating colors (typically black and white or red and black). The program must create an 8x8 (or specified size) grid where adjacent squares have different colors, simulating a traditional checkerboard. This teaches 2D list manipulation, nested iteration, modular arithmetic for pattern generation, and coordinate-based positioning. Formatting the Output Before writing any code, it

In this assignment, your goal is to build the initial framework for a checkers game board. The program's task is to create an 8x8 grid where the number 1 represents a checker piece and 0 represents an empty square.

: Iterating through the grid to modify specific elements.

This is "v1" of the problem, meaning it likely expects a straightforward approach using nested loops and conditionals, without more advanced optimizations.

def create_checkerboard(rows, cols): # Initialize an empty list to hold our 2D grid board = [] # Loop through each row for i in range(rows): # Create an empty row row = [] # Loop through each column in the row for j in range(cols): # Check if the sum of the indices is even if (i + j) % 2 == 0: row.append(1) else: row.append(0) # Add the completed row to the board board.append(row) return board # -- Code provided by CodeHS to print the board neatly -- def print_board(board): for row in board: print(" ".join([str(x) for x in row])) # Example Usage: my_board = create_checkerboard(8, 8) print_board(my_board) Use code with caution. Common Errors to Avoid