This article will break down the problem, explore the common pitfalls, provide step-by-step solutions in both Java (Console/Graphics) and JavaScript (Web Graphics), and explain the underlying principles so you can truly master the concept.
: Accesses the element located on the first row, in the second column. 2. Parity Logic (The Modulo Operator)
The Checkerboard V2 exercise is an excellent way to practice:
Before jumping to the code, review these topics: 9.1.7 Checkerboard V2 Codehs
Here's the complete code for the 9.1.7 Checkerboard V2 Codehs problem:
for (var row = 0; row < 8; row++) for (var col = 0; col < 8; col++) // code to draw a square will go here
public class CheckerboardV2 extends GraphicsProgram This article will break down the problem, explore
GRect square = new GRect(x, y, sqWidth, sqHeight); square.setFilled(true);
Some CodeHS courses use a console-based "ASCII art" version. This uses text characters instead of graphics.
Show how to do this in if you are in the Nitro/Java course Parity Logic (The Modulo Operator) The Checkerboard V2
You cannot simply print the final board. You must construct the 2D list. Wrong Dimensions: Ensure it is exactly 8x8.
// 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;
statements to check for walls and prevent the program from crashing at the edges of the grid. Conclusion