I tried to round a number yesterday and it was very frustrating, ended up using a string and then reconverting. How do you do it?

I use Apache Commons Math for that, but you can adapt the code from their strategies.

https://github.com/apache/commons-math/blob/master/src/main/java/org/apache/commons/math4/util/FastMath.java#L3487

and here is the other strategy: https://commons.apache.org/proper/commons-math/javadocs/api-3.6.1/src-html/org/apache/commons/math3/util/Precision.html#line.426

Well, @slack.jcpsantiago or you can use the fastmath clojure library where @tsulej has already carefully gone through a bunch of libraries and curated the fastest paths out of them for various forms of arithmetic: https://github.com/generateme/fastmath

haha, yes, fastmath exposes what I've mentioned above as round, rint, and approx

Nice thank you both, I'll check it out