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doc examples comments

1.3.0

recur

clojure.core

Please see http://clojure.org/special_forms#recur

© Rich Hickey. All rights reserved. Eclipse Public License 1.0

2 Examples top

link | changes
```
(def factorial
  (fn [n]
    (loop [cnt n acc 1]
       (if (zero? cnt)
            acc
          (recur (dec cnt) (* acc cnt))))))
```
(def factorial (fn [n] (loop [cnt n acc 1] (if (zero? cnt) acc (recur (dec cnt) (* acc cnt))))))
link | changes
```
; A loop that sums the numbers 10 + 9 + 8 + ...

; Set initial values count (cnt) from 10 and down
(loop [sum 0 cnt 10]
    ; If count reaches 0 then exit the loop and return sum
    (if (= cnt 0)
    sum
    ; Otherwise add count to sum, decrease count and 
    ; use recur to feed the new values back into the loop
    (recur (+ cnt sum) (dec cnt))))
```
; A loop that sums the numbers 10 + 9 + 8 + ... ; Set initial values count (cnt) from 10 and down (loop [sum 0 cnt 10] ; If count reaches 0 then exit the loop and return sum (if (= cnt 0) sum ; Otherwise add count to sum, decrease count and ; use recur to feed the new values back into the loop (recur (+ cnt sum) (dec cnt))))

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See Also top

0
clojure.core/loop
Evaluates the exprs in a lexical context in which the symbols in th
0
clojure.core/trampoline
trampoline can be used to convert algorithms requiring mutual recur

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