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paulmooring/project_euler_1.clj

Last active December 31, 2015 13:29
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project_euler_1.clj
(defn pe_1
"Returns the sum of all numbers below [x] that are multiples of 3 or 5"
[x]
(pe_1_acc x 0))
(defn pe_1_acc [x acc]
(cond
(= x 0) acc
(or (= 0 (rem x 3)) (= 0 (rem x 5))) (pe_1_acc (dec x) (+ acc x))
:else (pe_1_acc (dec x) acc)))
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