0.1 +0.1... 10 times != 1 in R

Asked Jul 12 '19 at 04:39

Active Jul 12 '19 at 04:53

Viewed 73 times

If I sum 0.1, 10 times in R why does it not equal 1?

e.g

0.1 + 0.1 + 0.1 + 0.1 + 0.1 + 0.1 + 0.1 + 0.1 + 0.1 + 0.1 == 1

returns

FALSE

However

0.1 * 10 ==1

returns

TRUE

Can anyone explain this behavior?

asked Jul 12 '19 at 04:39

user124123

1

I don't know if it's related here but whenever there is a question related to floating point it is somehow always linked to https://stackoverflow.com/questions/9508518/why-are-these-numbers-not-equal – Ronak Shah Jul 12 '19 at 04:42
and as mentioned `all.equal(0.1 + 0.1 + 0.1 + 0.1 + 0.1 + 0.1 + 0.1 + 0.1 + 0.1 + 0.1,1)` gives `#[1] TRUE` – Ronak Shah Jul 12 '19 at 04:44

0 Answers0