the result of Mod is surprising!

Asked Jul 31 '17 at 08:26

Active Jul 31 '17 at 09:25

Viewed 40 times

I am using Mathematica 11.1.1 and I was surprised when I saw:

Mod[0.2, 0.2] == 0.
Mod[0.4, 0.2] == 0.
Mod[0.6, 0.2] == 0.2
Mod[1.0, 0.2] == 0.2

I cannot understand why the last two results are wrong!!

edited Jul 31 '17 at 09:25

Mr.Wizard

asked Jul 31 '17 at 08:26

Unbelievable

Mod 0.2, they are correct, since Mod[0.,0.2] equals Mod[0.2,0.2]... However, this is weird, indeed. – Henrik Schumacher Jul 31 '17 at 08:32
2

This is not surprising at all; see this, and evaluate Mod[6/10,2/10]. – corey979 Jul 31 '17 at 08:36
@corey979 Doh. Right... – Henrik Schumacher Jul 31 '17 at 08:50

0 Answers0