Codehs 8.1.5 Manipulating 2d Arrays |verified|

// Swap two rows by reference public static void swapRows(int[][] arr, int r1, int r2) int[] temp = arr[r1]; arr[r1] = arr[r2]; arr[r2] = temp;

Understanding 8.1.5 isn't just about passing CodeHS—it's a foundational skill for:

What or failed autograder test are you currently seeing? Can you share the chunk of code you have written so far? AI responses may include mistakes. Learn more Share public link Codehs 8.1.5 Manipulating 2d Arrays

Tips for CodeHS-style problems

console.log(array); // Output: // [ // [1, 2, 3], // [4, 10, 6], // [7, 8, 9] // ] // Swap two rows by reference public static

result.push(newRow);

Manipulating 2D arrays is used in:

Write a method named doubleArray that takes a 2D integer array as a parameter and where each element is twice the original element.

// Print the entire 2D array in a readable format public void printScores() System.out.println("Student Scores (rows = students, cols = tests):"); for (int row = 0; row < scores.length; row++) System.out.print("Student " + (row + 1) + ": "); for (int col = 0; col < scores[row].length; col++) System.out.print(scores[row][col] + " "); Learn more Share public link Tips for CodeHS-style

"Write a method that takes a 2D array and returns the sum of the diagonal elements"