916 Checkerboard V1 Codehs Fixed |top|

The critical line that fixes most student errors is:

Use (row + col) % 2 === 0 to determine color.

Switch to the (row + col) % 2 == 0 check. This relies on absolute grid coordinates rather than stateful boolean switches. 2. Off-by-One Tracking Errors

Debugging CodeHS 9.1.6 Checkerboard v1: The Complete Fix Guide 916 checkerboard v1 codehs fixed

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

Hardcoding an alternating boolean variable (like count++ ) without resetting or offsetting it at the start of a new row.

Toggling a boolean variable at the end of the inner loop without accounting for whether the row length is even or odd. If your grid width is an even number (like 8x8), toggling a boolean at the end of a row makes the next row start on the exact same color. The critical line that fixes most student errors

If canvas is 400×400, each square = 50×50.

For the CodeHS assignment 9.1.6 Checkerboard, v1 , the goal is to create an

: Iterating through the grid to modify specific elements. If your grid width is an even number

To build a flawless checkerboard pattern, you must calculate the value of a cell based on its unique mathematical coordinates: the and the column index .

for (int row = 0; row < rows; row++) for (int col = 0; col < cols; col++) Color color = (row + col) % 2 == 0 ? Color.BLACK : Color.WHITE; g.setColor(color); g.fillRect(col * squareSize, row * squareSize, squareSize, squareSize);