I have the following:
-1 mod 5
I expect to get 4.
However in JS (-1 % 5), I'm getting -1.
What am I doing wrong?
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1By what logic would you expect to get 4?user663031– user6630312017-07-22 14:02:15 +00:00Commented Jul 22, 2017 at 14:02
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@torazaburo google logic: google.com/…SB2055– SB20552017-07-22 14:03:02 +00:00Commented Jul 22, 2017 at 14:03
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1The number -1 is equal to 4 (modulo 5).Pointy– Pointy2017-07-22 14:04:45 +00:00Commented Jul 22, 2017 at 14:04
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@Pointy I must not understand basic math. The fact remains that JS results != google arithmetic results.SB2055– SB20552017-07-22 14:09:08 +00:00Commented Jul 22, 2017 at 14:09
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1As the wiki article linked from the duplicate states programming languages vary in how negatives are treated en.m.wikipedia.org/wiki/Modulo_operationMartin Smith– Martin Smith2017-07-22 14:11:31 +00:00Commented Jul 22, 2017 at 14:11
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1 Answer
mod is the leftover when you divide the number by the divider.
In Math -1%5 = -1 so Js is working as expected.
You are not doing anything wrong. If you want to get a positive number (the difference) add the divider number to the result.
var result = (-1 % 5) + 5;
It doesn't matter where you add the number before the module or after. Its a pure math.
1 Comment
SB2055
