Arrays in JavaScript - JavaScript Tutorial 96
Notes for You:: Arrays in JavaScript - JavaScript Tutorial 96
Array:
Array is a collection of data elements (or data values).
Arrays are created to store multiple values in a single variable.
Note:
Each element in the array is going to have an index; hence arrays are also called as indexed variables.
Arrays follow 0 based indexing; i.e. first element in the array is going to have an index 0.
How to declare and initialize a variable of type array:
Syntax 1: using constructor notation
var arrayName = new Array(comma separated list of values);
Ex:
var studNames = new Array(“Ram”,”Ravi”,”Raju”,”Raghu”,”Gopal”);
Syntax 2: using literal notation
var arrayName = [comma separated list of values];
Ex:
var studNames = [“Ram”,”Ravi”,”Raju”,”Raghu”,”Gopal”];
How to get value of an array element:
We can get value of an array element by its index.
Syntax:
arrayName[index]
Ex:
document.write( studNames[0] ); // Ram
How to set new value to an array element:
We can set new value to an array element using assignment operator.
Syntax:
arrayname[index] = newvalue;
Ex:
studNames[0]=”Rahul”;
document.write(studNames[0]); // Rahul
Example Code:
// var studNames = new Array("Ram","Ravi","Raju","Raghu","Gopal");
var studNames = ["Ram","Ravi","Raju","Raghu","Gopal"];
document.write( studNames[0] ); // Ram
document.write( studNames[1] ); // Ravi
document.write( studNames[2] ); // Raju
document.write( studNames[3] ); // Raghu
document.write( studNames[4] ); // Gopal
studNames[0] = "Rahul";
document.write( studNames[0] ); // Rahul
document.write( studNames[1] ); // Ravi
document.write( studNames[2] ); // Raju
document.write( studNames[3] ); // Raghu
document.write( studNames[4] ); // Gopal
=========================================
Follow the link for next video:
JavaScript Tutorial 97 - Traversing an Array in JavaScript | JavaScript Array Traversal
• Traversing Arrays in JavaScript - Jav...
Follow the link for previous video:
JavaScript Tutorial 95 - Email ID Validation in JavaScript with Regular Expression
• JavaScript Email Validation: RegExp -...
=========================================
JavaScript Tutorials Playlist:-
• JavaScript Tutorials
=========================================
Watch My Other Useful Tutorials:-
jQuery Tutorials Playlist:-
• jQuery Tutorials
jQuery UI Tutorials Playlist:-
• jQuery UI Tutorials
Bootstrap Tutorials Playlist:-
• Bootstrap4 Tutorials
=========================================
► Subscribe to our YouTube channel:
/ chidrestechtutorials
► Visit our Website:
https://www.chidrestechtutorials.com
=========================================
Hash Tags:-
#ChidresTechTutorials #JavaScript #JavaScriptTutorial
Sur cette page du site, vous pouvez voir la vidéo en ligne Arrays in JavaScript - JavaScript Tutorial 96 durée heure minute seconde en bonne qualité , qui a été Téléchargé par l'utilisateur ChidresTechTutorials 22 février 2022, Partagez le lien avec vos amis et connaissances, sur youtube cette vidéo a déjà été regardée 1,017 fois et il a aimé 34 téléspectateurs. Bon visionnage!
