How Do I Create and Access 2D Arrays in JavaScript?

Creating and Accessing Two-Dimensional Arrays in JavaScript

Despite debates surrounding the existence of two-dimensional arrays in JavaScript, you can create an array of arrays to emulate their functionality. Here's how:

Declaring a 2D Array:

To declare a 2D array in JavaScript, define an array named myArray and assign to it an array of arrays, e.g.:

let myArray = [[1, 2], [3, 4], [5, 6]];

Accessing Members:

To access members of this 2D array, use nested indexing using square brackets, e.g.:

Accessing by Row and Column:

• myArray[0][1]: Accesses the element in the first row (index 0) and second column (index 1) - returns 2.
• myArray[1][0]: Accesses the element in the second row (index 1) and first column (index 0) - returns 3.

Retrieving the Entire Array:

• myArray: Returns the entire two-dimensional array.

The above is the detailed content of How Do I Create and Access 2D Arrays in JavaScript?. For more information, please follow other related articles on the PHP Chinese website!