There is a сalculation error during addition of two numbers in Scala

Question

When I add two numbers together I get Calculation error like that:

0.1 + 0.2 = 0.30000000000000004

Can I solve this problem without rounding the result?

score 1 · Accepted Answer · 2021-11-29T21:21:44.030

1

In short: No. Try googeling floating point arithmetic. That should answer all your questions.

edited Nov 29 '21 at 21:21

answered Nov 29 '21 at 10:54

This is almost a link-only answer, the only saving grace is the "no". In the future it's best to at least summarize the information in the link. https://meta.stackoverflow.com/a/288056/238704 – President James K. Polk Nov 29 '21 at 20:57
It isn't. The link is merely an extra-hint. The main-part of this answer is the "keyword" floating point arithmetic. If you look that up in any search engine you'll instantly get an answer. – Nov 29 '21 at 21:19

score 0 · Answer 2 · answered Nov 29 '21 at 11:57

0

You also could use something different from Double, like BigDecimal:

BigDecimal.valueOf(0.1) + BigDecimal.valueOf(0.2)

answered Nov 29 '21 at 11:57

Javier Montón

2 Answers2