2D Array
Sophie Anderson
7 min read
Study Guide Overview
This unit covers 2D arrays, focusing on their use for organizing data in a grid-like structure. Key concepts include initializing 2D arrays, understanding their representation as both nested arrays and grids/tables, traversing 2D arrays using nested loops, and implementing algorithms with them. The unit also emphasizes avoiding ArrayIndexOutOfBoundsException and introduces double-index notation for accessing array elements.
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Question 1 of 11
🥳 Which of the following is the correct syntax to declare and initialize an empty 2D array of integers with 3 rows and 4 columns?
int[][] arr = new int[4][3];
int arr[][] = new int[3,4];
int[][] arr = new int[3][4];
int arr = new int[3][4];