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Convert to Hexadecimal

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Challenge

Write a program that takes in a number greater than or equal to 0 and outputs its representation in hexadecimal (base 16).

Examples

0     => 0
1     => 1
10    => A
15    => F
16    => 10
107   => 6B
153   => 99
207   => CF
1000  => 3E8
10381 => 288D
48821 => BEB5

Rules

No built-in hexadecimal functions.
- More generally, any base conversion function is considered to be disallowed.
Letters can be uppercase or lowercase.
It should work at least for all inputs greater than 0 up to the language's default type limit.
Leading zeros in the output is fine. (i.e. 000003E8 for 32-bit numbers)
This is [code-golf], so shortest code wins.

code-golf math base hexadecimal

posted about 2 months ago

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2mo ago

214 reputation 6 17 23 24

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is a duplicate

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not constructive

This question cannot be answered in a way that is helpful to anyone. It's not possible to learn something from possible answers, except for the solution for the specific problem of the asker.

Vyxal, 24 bytes ``` 16ʀẋf …

2mo ago

Lean 4, 103 100 95 83 bytes …

1mo ago

[JavaScript (Node.js)], 60 byt …

4d ago

2 comment threads

Input in integer type? (4 comments)

What defines a "Hexadecimal function"? Is it strictly a `toHex` function? Is `.toString(16)` banned? ... (6 comments)

Post

+1

−0

JavaScript (Node.js), 60 bytes

n=>{for(l='';n;l="0123456789ABCDEF"[n%16]+l,n>>=4);return l}

Explanation

n=>{for(l='';n;l="0123456789ABCDEF"[n%16]+l,n>>=4);return l}/*
        l='';                                                   | ⁡Starting with an empty string...
    for(     n;                                  );             | ⁢...loop while n still has hex digits (i.e. nonzero):
               l="0123456789ABCDEF"[n%16]+l,                    | ⁣    add the hex digit corresponding to n mod 16 on the left (so no +=)
                                            n>>=4               | ⁤    then floor division by 16
n=>{                                               return l}    | ⁢⁡(in an anonymous arrow function)
💎*/

Created with the help of Luminespire.

Caveats

"It should work at least for all inputs greater than 0 up to the language's default type limit." - the question. (i.e. returning an empty string for 0 is fine)
_{"The empty string is a syntactically valid representation of zero in positional notation (in any base), which does not contain leading zeros." - Wikipedia, which agrees with my opinion, but that doesn't matter anyways as stated above}

posted 4 days ago

CC BY-SA 4.0

4d ago

hydroxyl-radical‭

36 reputation 1 2 5 14

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Currently works a second time - does it need to? (1 comment)

trichoplax‭ wrote 4 days ago

There's a way to save 4 bytes but it will make the code break after the first time it is called. I don't think we have a rule on this yet, so I've raised on Meta Answers that work only once to see what the community thinks. So the suggestion mentioned there as an example might not be valid yet, but there's a chance it may become valid once there's a consensus. I can't guess which way it will go.