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Collections are a way for you to organize kata so that you can create your own training routines. Every collection you create is public and automatically sharable with other warriors. After you have added a few kata to a collection you and others can train on the kata contained within the collection.
Get started now by creating a new collection.
Forked and approved
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There's a "bug" in your solution, try checking with input
$num = 696and see what is wrong.Not a kata issue.
https://www.codewars.com/kata/58311536e77f7d08de000085/discuss/javascript#5831c25bb3081b161c00005f
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If you want to play violin concertos in binary, study Hacker's Delight. But frankly – unless you're writing an optimizing compiler or similar low-level stuff, this isn't important. May be the opposite, if it leads to cryptic code. I wrote this kata just for fun, it's not meant to be useful. :-)
Just tried it on the language you used, PHP. Nope, nothing different. There's nothing wrong with using mod.
Not a valid kata issue, marking as resolved.
There's literally nothing wrong with using mod operator. Unless it has different behaviour on certain number in your language?
We can't read your mind, please give actual details.