Converting binary to hexadecimal

Question

I am converting binary to hexadecimal but the code below returns a wrong answer:

var number = 1011;
var hexa = parseInt(number, 2).toString(16);
return hexa;

This returns b but it should have to be return B. What is the problem?

`parseInt(number , 2).toString(16).toUpperCase();` – Arun P Johny Apr 12 '16 at 03:11 — Arun P Johny, Apr 12 '16 at 03:11
Hexadecimal can be lowercase – Nick Zuber Apr 12 '16 at 03:12 — Nick Zuber, Apr 12 '16 at 03:12

score 18 · Answer 1 · answered Apr 12 '16 at 03:12

18

'b' is correct. Hexadecimal doesn't specify letter case, and many write hex strings with lower-case letters.

answered Apr 12 '16 at 03:12

rsjaffe

score 11 · Accepted Answer · answered Feb 26 '18 at 13:17

11

Just add toUpperCase():

var hexa = parseInt(number, 2).toString(16).toUpperCase();

answered Feb 26 '18 at 13:17

Lukasz Czerwinski

what if it is supposed to be a lowercase and then gets turned into the uppercase? – Ramen_Lover912 Feb 27 '20 at 07:46
Note that you might lose information when converting big numbers this way, due to the limited precision of integers. If you need a higher level of precision, this solution leveraging `BigInt` might help: https://stackoverflow.com/a/55681265/3366464 – Gertjan Franken Apr 03 '20 at 07:54

2 Answers2