Arrays:
=======
Collection of similar data items.

[1,3,5,7,9] ==> Number array
[1,1.2,2.3,123]
["a", "b", "c"]

Array Definition:
=================
2-ways:
	1) Literal Form
	================
	Syntax:
		let/var/const name-of-array = [elements/items with comma separation]

const a = []
let b = [1,2,3,4,5,6]
var c = ['a','b','c']

console.log(typeof a)
console.log(typeof b)
console.log(typeof c)

a = [[1,3,5],[7,9,11],[2,4,6],[8,10,12]]

console.log(a)

	2) Object Form
	==============
	==> class for the Array ==> "Array"
	==> using "new" keyword/operator we can create an object for the class "Array"
		==> Array Object
	Syntax:
		let/var/const name-object = new Array(elements with comma)

let a = new Array(10,20,30,40)
// classname objname = new classname();

console.log(a)
console.log(typeof a)

Multi-dimensional Array:
=======================
a = new Array([1,3,5,7,9],[2,4,6,8,0])

console.log(a)

===============================================
Indexing:
=========
[]

// accessing individual elements of array ==> indexing

a = [1,3,5,7,9] // 1d-array
b = [[1,2,3,4],[5,6,7,8]]   // 2d-array
c = [[[1,2,3],[4,5,6],[7,8,9]],[[0,2,4],[6,8,10],[1,3,5]]] // 3d-array

console.log(a[0])
console.log(a[1])
console.log(a[2])
console.log(a[3])
console.log(a[4])

console.log(b[0])
console.log(b[1])
console.log(b[0][0],b[1][0])
console.log(b[0][1],b[1][1])
console.log(b[0][2],b[1][2])
console.log(b[0][3],b[1][3])

console.log(c[0])
console.log(c[1])

console.log(c[0][0])
console.log(c[0][1])

console.log(c[0][0][0])
=========================================
WAP TO PRINT THE LAST ELEMENT OF THE ARRAY.
===========================================
array-name.length - 1

=================================================
Mutability:
===========

a = new Array(10,20,30,40)
b = [10,20,30]

console.log(a)
console.log(b)

a[1] = -20
b[1] = -20

console.log(a)
console.log(b)

=================================
push():
=======
==> can be used to add element at the end of the array.
Syntax:
	array-name.push(element)	

a = new Array(10,20,30,40)

console.log(a)

a.push(50)

console.log(a)

==============================
unshift():
==========
==> can be used to add the element at the beginning of the array.
Syntax:
	array-name.unshift(element)

a = new Array(10,20,30,40)

console.log(a)

a.push(50)

console.log(a)

a.unshift(0)

console.log(a)
================================
splice()
=======
==> can add element at the specified index
Syntax:
	a.splice(index, element)

=======================================
pop()

a = new Array(10,20,30,40)

console.log(a)

a.pop()

console.log(a)

a.shift()

console.log(a)

a.splice(1)

console.log(a)

==========================================
1) WAP IN JS TO FIND THE SECOND LARGEST ELEMENT FROM THE ARRAY.
2) WAP IN JS TO FIND THE LENGTH OF THE ARRAY WITHOUT BUILT-IN METHOD.
3) WAP IN JS TO REVERSE THE ARRAY.