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JavaScript: Convert Hexadecimal to ASCII format

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:

Flowchart: JavaScript- Convert Hexadecimal to ASCII format

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

var functionName = function() {} vs function functionName() {}

The difference is that functionOne is a function expression and so only defined when that line is reached, whereas functionTwo is a function declaration and is defined as soon as its surrounding function or script is executed (due to hoisting).

For example, a function expression:

// TypeError: functionOne is not a function
functionOne();

var functionOne = function() {
  console.log("Hello!");
};

Historically, function declarations defined within blocks were handled inconsistently between browsers. Strict mode (introduced in ES5) resolved this by scoping function declarations to their enclosing block.

'use strict';    
{ // note this block!
  function functionThree() {
    console.log("Hello!");
  }
}
functionThree(); // ReferenceError

Ref: https://bit.ly/2zMAj1O