Modulus

Question

what excactly does the %? i passed the test but dont understand it excactly

Answer 1

Same as divide but it is used for the remainder
Like 12%5 will be equal to 2
as the remainder is 2

Answer 2

Meta/aside:

Here's a chart including negative value behavior in Javascript:

12 % 7: 5
-12 % 7: -5
12 % -7: 5
-12 % -7: -5

The result takes the sign of the numerator (dividend); other languages use the sign of the denominator (divisor) and the answer will also be correct, but different. This is a policy decision per language.

Not to confuse you (at all), I'm just mentioning this so that you know to check which policy your language uses.

Answer 3

It gives you the remainder of an integer division.
a%b=a-a*(floor(a/b))