Ensure your loop conditions use < rather than <= . If an array has a length of 5, the last index is 4. Using <= will trigger an ArrayIndexOutOfBoundsException . Why This Matters
If the task requires you to fill a 2D array with specific values (like a multiplication table or a coordinate grid), your code would look similar to this: Codehs 8.1.5 Manipulating 2d Arrays
grid[1][1] = 99; // changes center element to 99 Ensure your loop conditions use If the task
The final value should be the sum of the first value in the 2D array and the last value in that specific row (often calculated as the first value + the length of that row). Key Technique: The updateArray Method Codehs 8.1.5 Manipulating 2d Arrays