JavaScript: Convert Hexadecimal to ASCII format

Last update on May 30 2022 10:02:10 (UTC/GMT +8 hours)

JavaScript String : Exercise-28 with Solution

Write a JavaScript function to convert Hexadecimal to ASCII format.

Test Data:
console.log(hex_to_ascii('3132'));
console.log(hex_to_ascii('313030'));
Output:
"12"
"100"

Sample Solution:-

HTML Code:

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <title>Write a JavaScript function to convert Hexadecimal to ASCII</title>
</head>
<body>

</body>
</html>

JavaScript Code:

function hex_to_ascii(str1)
 {
	var hex  = str1.toString();
	var str = '';
	for (var n = 0; n < hex.length; n += 2) {
		str += String.fromCharCode(parseInt(hex.substr(n, 2), 16));
	}
	return str;
 }
console.log(hex_to_ascii('3132'));
console.log(hex_to_ascii('313030'));

Sample Output:

12
100

Flowchart:

Live Demo:

See the Pen JavaScript Convert Hexadecimal to ASCII format - string-ex-28 by w3resource (@w3resource) on CodePen.

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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