Please note, this is a STATIC archive of website www.w3resource.com from 19 Jul 2022, cach3.com does not collect or store any user information, there is no "phishing" involved.
w3resource

JavaScript: Add items in a blank array and display the items

JavaScript Array: Exercise-13 with Solution

Write a JavaScript program to add items in an blank array and display the items.

Sample Screen:
add elements in an blank array

Sample Solution:

HTML Code:

<!DOCTYPE html>
<html>
<head>
<meta charset=utf-8 />
<title>JS Bin</title>
<style>
body {padding-top:50px} 
</style> 
</head>
<body>
<input type="text" id="text1"></input>
<input type="button" id="button1" value="Add" onclick="add_element_to_array();"></input>
<input type="button" id="button2" value="Display" onclick="display_array();"></input>
<div id="Result"></div> 
</body>
</html>

JavaScript Code:

var x = 0;
var array = Array();

function add_element_to_array()
{
 array[x] = document.getElementById("text1").value;
 alert("Element: " + array[x] + " Added at index " + x);
 x++;
 document.getElementById("text1").value = "";
}

function display_array()
{
   var e = "<hr/>";   
    
   for (var y=0; y<array.length; y++)
   {
     e += "Element " + y + " = " + array[y] + "<br/>";
   }
   document.getElementById("Result").innerHTML = e;
}

Flowchart:

Flowchart: JavaScript: Display the colors entered in an array by a specific format

ES6 Version:

let x = 0;
const array = Array();

function add_element_to_array()
{
 array[x] = document.getElementById("text1").value;
 alert(`Element: ${array[x]} Added at index ${x}`);
 x++;
 document.getElementById("text1").value = "";
}

function display_array()
{
   let e = "<hr/>";   
    
   for (let y=0; y<array.length; y++)
   {
     e += `Element ${y} = ${array[y]}<br/>`;
   }
   document.getElementById("Result").innerHTML = e;
}

Live Demo:

See the Pen JavaScript: Add items in a blank array and display the items - array-ex-13 by w3resource (@w3resource) on CodePen.


Improve this sample solution and post your code through Disqus

Previous: Write a JavaScript program to compute the sum and product of an array of integers.
Next: Write a JavaScript program to remove duplicate items from an array (ignore case sensitivity).

What is the difficulty level of this exercise?

Test your Programming skills with w3resource's quiz.



JavaScript: Tips of the Day

How to insert an item into an array at a specific index (JavaScript)?

What you want is the splice function on the native array object.

arr.splice(index, 0, item); will insert item into arr at the specified index (deleting 0 items first, that is, it's just an insert). In this example we will create an array and add an element to it into index 2:

var arr = [];
arr[0] = "Jani";
arr[1] = "Hege";
arr[2] = "Stale";
arr[3] = "Kai Jim";
arr[4] = "Borge";

console.log(arr.join());
arr.splice(2, 0, "Lene");
console.log(arr.join());

Ref: https://bit.ly/2BXbp04