How can I create a two dimensional array in JavaScript?

Creating a two-dimensional array in JavaScript is essentially building an array of arrays. This structure is useful when you need to work with matrix-style data, like a grid or table.

Here’s how you can create and use a 2D array in [removed]

 Initialization

You can define a 2D array manually like this:

let matrix = [

  [1, 2, 3],

  [4, 5, 6],

  [7, 8, 9]

];

Or dynamically, using loops:

let rows = 3;

let cols = 3;

let matrix = [];

for (let i = 0; i < rows xss=removed xss=removed xss=removed>

 Accessing Elements


You access elements using matrix[row][column]:

  console.log(matrix[0][1]); // Output: 2

 Tips


• JavaScript doesn’t have native multi-dimensional arrays like some other languages; you simulate them with arrays of arrays.

• Always initialize inner arrays separately to avoid unexpected behavior.

• Great for grids, spreadsheets, or games like tic-tac-toe.