Multi - Dimensional Array

Introduction

Multidimensional array is an array, which contains one or more arrays.

Multi-Dimensional Array Declaration

Syntax


var arrayName = [['value','value',...],['value','value',...],['value','value',...],....];

We can declare 2-Dimenesional, 3-Dimensional and any No. of Dimensional array.

Example

We are Creating a Array, Which stores the Name, Age and Gender of 3 peoples.


var identity = [['Sam','25','Male'],['Jatin','19','Male'],['Kirti','23','Female']];

In this way, Arrays with unique index are declared.

Accessing The Multi-Dimensional Array Elements

To Access or Print Element in Array, We should know the Index of Element.

Syntax


arrayName[rowNumber][columnNumber];

Here,

Inside Square Brackets Index of the Element should be placed.

Let's Understand How to Find The Index of Multi-Dimensional Array :

For Example : If it is 2-Dimensional Array, Then you should imagine

2-D Dimensional Array

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For Example : If it is 3-Dimensional Array, Then you should imagine

3-D Dimensional Array

Example:


var identity = [['Sam','25','Male'],['Jatin','19','Male'],['Kirti','23','Female']];

console.log(identity[0][0]);
console.log(identity[0][1]);
console.log(identity[0][2]);

console.log(identity[1][0]);
console.log(identity[1][1]);
console.log(identity[1][2]);

console.log(identity[2][0]);
console.log(identity[2][1]);
console.log(identity[2][2]);

// Output
// Sam
// 25
// Male
// Jatin
// 19
// Male
// Kirti
// 23
// Female

Now Try to Visualize This 3-D Dimensional Array.

Copy of 3-D Dimensional Array

Iteration Through Multi Dimensional Array

We, will be using Nested for Loop.

Printing All Elements of Multi-Dimensional Array.


var identity = [['Sam','25','Male'],['Jatin','19','Male'],['Kirti','23','Female']];
var totalLength = identity.length;             //2
var i;

for(i=0;i