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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.


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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).

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JavaScript: Tips of the Day

JavaScript: Performs left-to-right function composition for asynchronous functions

Example:

const pipeAsyncFunctions = (...fns) => arg => fns.reduce((p, f) => p.then(f), Promise.resolve(arg));
const sum = pipeAsyncFunctions(
  a => a + 1,
  a => new Promise(resolve => setTimeout(() => resolve(a + 2), 1000)),
  a => a + 3,
  async a => (await a) + 4
);
(async () => {
  console.log(await sum(5)); 
})();

Output:

15