Define a dimensional array once at initialization. Example: For a 2-Dimensional integer array, initialization can be done by putting values in curly braces "{" and "}". We had seen 4 solutions to do this in JavaScirpt. In JavaScript, an array of arrays can be used as a 2D array. The easiest way to define a multidimensional array is to use the array literal notation. ; fill is intentionally generic: it does not require that its this value be an Array object. ; fill is a mutator method: it will change the array itself and return it, not a copy of it. We can also initialize columns of different length with an array initializer as shown below: Multidimensional arrays are not directly provided in JavaScript. For the arrays with specified size we initialize values as follows. Initialize an array with range 0 to N in JavaScript In this post, we will see how to initialize an array with range from 0 to N in JavaScript. If we want to use anything which acts as a multidimensional array then we need to create a multidimensional array by using another one-dimensional array. There are several ways to create a numbered array of integers from 0 (inclusive) to N (exclusive), incremented by step 1 , where value N is dynamic. Multidimensional array has more than 1 dimension, such as 2 dimensional array, 3 dimensional array etc. var values = new Array ( 10, 20, 30 ); console.log( "VALUES: " + values); Output VALUES: 10,20,30 Arrays are a special type of objects. The typeof operator in JavaScript returns "object" for arrays. To create a two-dimensional array in JavaScript, you can try to run the following code − Arrays use numbers to access its "elements". The following program shows how to create an 2D array : ; If the first parameter is an object, each slot in the array will reference that object. Initialization 1. If start is negative, it is treated as array.length + start. ; If end is negative, it is treated as array.length + end. If the only argument passed to the Array constructor is an integer between 0 and 2 32-1 (inclusive), this returns a new JavaScript array with its length property set to that number (Note: this implies an array of arrayLength empty slots, not slots with actual undefined values). JavaScript program that uses constructor, 3 arguments // Use array constructor with 2 or more arguments to create an array. To declare an empty multidimensional array, you use the same syntax as declaring one-dimensional array: Protip: If you use node, you can require smallest lodash.range package from npm.. Recap. For this reason, we can say that a JavaScript multidimensional array is an array of arrays. So multidimensional arrays in JavaScript is known as arrays inside another array. JS Multidimensional Array. This will create a two dimensional array as shown below: [0] [0, 0] [0, 0, 0] 6. 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