java - Get exponent of a BigDecimal -

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i want exponent of bigdecimal.

`1m` (`1e0m`)      -> `0` `10m` (`1e1m`)     -> `1` `11m` (`1.1e1m`)   -> `1` `1e2m`             -> `2` `1.0e2m`           -> `2` `100m` (`1.00e2m`) -> `2`

scale, @ least itself, not need. rather not have use .toplainstring , hack around that.

i'm little surprised exponent want isn't part of internal representation of bigdecimal.

i'm using bigdecimal clojure, logic works java welcome too.

(defn exp<-bigdec   "returns exponent, b, bigdecimal in form * 10 ^ b."   [x]   (- (.precision x) (.scale x) 1))

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