Why is 3 % 7 = 3? How did Swift calculate that?

I could be wrong since I am still somewhat of a novice, however if it works the way I understand it, then modulus returns the remainder of a division operation. Since 7 will not got into 3, the answer is 0 and you are left with 3. Again this is just my understanding. Hope that it was helpful.

Hey Jeffrey,

that's a great question. I didn't know either so I did some basic testing to find an answer.

I kept switching a and b to see what the result would be. So it appears that the built-in modulus operator can't handle a particular case where 'a' is less than 'b' so it simply returns 'a'.

var a = 5
var b = 10000
var c = a % b
print(c)
//answer is 5

You can try this out on the Xcode playground to see it for yourself if you want.

Anyways hope that helps!