Multiplying the current row or col index by the SQUARE_SIZE ensures that each square is placed precisely next to the previous one without overlapping. 4. Conditional Statement
# Create an 8x8 grid of 0s grid = [[0 for _ in range(8)] for _ in range(8)] # Use nested loops to apply the pattern for row in range(8): for col in range(8): # If the sum of row and column is even, set to 1 if (row + col) % 2 == 0: grid[row][col] = 1 # Print the final board print_board(grid) Use code with caution. Copied to clipboard Why this works
Let's walk through each part of the code to solidify your understanding:
If you have completed the basic , consider challenging yourself with these variations: 9.1.7 checkerboard v2 answers
"Good instinct," Maya said. "Copying the answer key is like eating the menu instead of the meal. Let’s figure it out the hard way."
The outer for loop runs once for each row. For every iteration, a new empty list called row is created. This list will hold the values for that specific row.
If one side of a trunk is set to VLAN 1 and the other to VLAN 99, Packet Tracer will throw continuous CDP syslog errors and block traffic. Multiplying the current row or col index by
: We add a space " " after each number to make the output readable and use print() at the end of the inner loop to move to the next line. Alternative Approach (String Multiplication)
Let me start writing.The following article is intended for educational purposes only. It provides a comprehensive breakdown of the exercise and its solution, but the best way to learn is to first attempt the problem yourself.**
"You look like you're trying to calculate the trajectory of a Mars rover, but you’re just staring at a black screen." Copied to clipboard Why this works Let's walk
For more practice on similar grid-based logic, you can explore the CodeHS Python Curriculum which covers 2D lists and nested iterations in detail.
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For a more concise approach:
. In a checkerboard, a cell changes color every time you move one step in any direction. Mathematically, this happens when the sum of the row and column indices switches between even and odd. , the sum is even. , the sum is odd. By setting elements to
Mastering 9.1.7 Checkerboard v2: Answers, Logic, and Python Solutions