Hex Number to Char using Javascript

Question

How do i convert , p.ex, the string "C3" to it's char using javascript? i've tried charCodeAt, toString(16) and everything, doesn't work.

var justtesting= "C3"; //there's an input here
var tohexformat= '\x' + justtesting; //gives wrong hex number

var finalstring= tohexformat.toString(16);

Thank you

"http://stackoverflow.com/questions/26301638/javascript-convert-string-representation-of-hex-value-to-hex" related!! — i.Dio, Dec 05 '16 at 14:52
You also don't have quotes around `C3`, so it's not interpreting it as a string. — Iluvatar, Dec 05 '16 at 14:53
OP is not attempting to convert decimal values to hexadecimal. — Mike Cluck, Dec 05 '16 at 14:55
yep. it's a string.. i just can't turn a string to an hex, i.e `31` to number `1` cause when i try to add `\x` it gives me just two more chars, instead of a hex value — i.Dio, Dec 05 '16 at 14:56

score 20 · Accepted Answer · answered Dec 05 '16 at 14:59

All you need is parseInt and possibly String.fromCharCode.

parseInt accepts a string and a radix, a.k.a the base you wish to convert from.

console.log(parseInt('F', 16));

String.fromCharCode will take a character code and convert it to the matching string.

console.log(String.fromCharCode(65));

So here's how you can convert C3 into a number and, optionally, into a character.

var input = 'C3';
var decimalValue = parseInt(input, 16); // Base 16 or hexadecimal
var character = String.fromCharCode(decimalValue);
console.log('Input:', input);
console.log('Decimal value:', decimalValue);
console.log('Character representation:', character);

score 0 · Answer 2 · answered Jun 09 '20 at 16:19

Another simple way is to print "&#"+ CharCode like this

for(var i=9984;i<=10175;i++){
    document.write(i+ "&nbsp;&nbsp;&nbsp;" + i.toString(16) + "&nbsp;&nbsp;&nbsp;&#" + i +"<br>");
}

OR

for(var i=0x2700;i<=0x27BF;i++){
    document.write(i+ "&nbsp;&nbsp;&nbsp;" + i.toString(16) + "&nbsp;&nbsp;&nbsp;&#" + i +"<br>");
}

JSFIDDLE

Hex Number to Char using Javascript

2 Answers2