Numbers ==> Numeral values
Strings ==> Literals
Boolean ==> true/false
Undefined
null
Immutable Types Vs Mutable Types:
=================================
Primitive Types ==> Immutable Types
Immutable ==> data once we can define,
we cannot be allow for modification
string = "JavaScript";
console.log(string[0]);
console.log(string);
string[0] = 'j';;
console.log(string);
Non-Primitive Datatypes:
========================
==> Collections
==> Mutable
after the definition we can allow for modification.
==> Non-primitive datatypes are:
1) Array
2) Object
3) Map
Array Type
===========
How we can understand an array?
===============================
form a queue form a stack form an array
==============================================================
Aakash Browser 3-people were
Ashwin History Ashwin ==> 9am ==> 11 am
Asha Asha ==> 9.30am ==> 10am
Jyothi Aarohi ==> 8.30 am ==> 12 noon
FIFO ==> First Input First Output
LIFO ==> Last Input First Output
==> array is collection of any type of elements
array elements should be order
but accessing should be random.
Why we need arrays?
===================
==> for programming perspective,
arrays can be used for reducing the overhead and complexity.
Electronic Devices
Storage
Magnetic Tapes Disk/DVD/Floppy
Java ==> Strongly Typed
C/C++ ==> Statically Typed
JS/Python ==> Dynamically typed
==========================================
Is array size dynamically changed?
==================================
Yes.
Document
=================================================
How to configure arrays:
========================
1) Array declaration
2) Array initialization
using []:
========
Syntax:
let/var/const arrayName;
arrayName = []; // js compiler, assigning the memory to the array
Document
========================================================
using Array():
=============
Syntax:
let/var/const arrayName = new Array();
or
let/var/const arrayName = new Array(size);
Document
=======================================
Array Initialization:
=====================
let a; // declaration
a = 10; // assignment
var b = 20; // initialization
Document
========================================
Index Vs Property:
=================
Arrays in JS ==> not been specified with index
those can be specified with property
property ==> string type
Document
==========================================
Document