Codehs 8.1.5 Manipulating 2d Arrays =link= Jun 2026
An outer loop controls the current row, while an inner loop moves through the columns of that row. Key Rule for Modification
Once you’ve submitted a working solution, challenge yourself by modifying the code to triple the values, or to add 10 to each element. Experimentation is the best teacher.
Write a method named doubleArray that takes a 2D integer array as a parameter and where each element is twice the original element. Codehs 8.1.5 Manipulating 2d Arrays
While specific CodeHS exercises may evolve, 8.1.5 focuses on applying functions to modify or analyze every element within a 2D structure. Common tasks include: (e.g., doubling every value). Searching for a value (e.g., finding the maximum value). Summing all elements . Scenario: Doubling a 2D Grid
: Changing all values in a single row (e.g., grid[0][i] = 1 ). An outer loop controls the current row, while
Her mind raced through the CodeHS lessons: Manipulating 2D arrays means thinking in two dimensions at once.
: To target the final index of any row regardless of its size, use array[row].length - 1 Example Walkthrough If your 2D array is int[][] array = 3, 5, 0, 10, 20, 30, 40, 0, 9, 8, 0 : The new value is array.length (which is 3, the number of rows). Write a method named doubleArray that takes a
Elara never wanted to be a Gridkeeper. She wanted to paint nebulas, not debug the rigid, glowing lattice that powered the city of Veridian. But when the old Keeper, Master Thorne, caught her secretly feeding corrupted data into the city’s light fountains, he didn’t exile her. He made her his apprentice.
