cljs.math/floor

function

since v1.11.50

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Source docstring:

Returns the largest double less than or equal to a, and equal to a
mathematical integer.
If a is ##NaN or ##Inf or ##-Inf or already equal to an integer => a
If a is less than zero but greater than -1.0 => -0.0
Note that if a is `nil` then an exception will be thrown. This matches Clojure, rather than js/Math.floor
See: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/floor

(defn ^number floor
  {:added "1.11.10"}
  [a]
  (if (some? a)
    (Math/floor a)
    (throw (ex-info "Unexpected Null passed to floor" {:fn "floor"}))))

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