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1.3.0 permalink

1.2.0
1.3.0

or

Evaluates exprs one at a time, from left to right. If a form
returns a logical true value, or returns that value and doesn't
evaluate any of the other expressions, otherwise it returns the
value of the last expression. (or) returns nil.

2 Examples top

link | changes
```
user> (or true false false)
true

user> (or true true true)
true

user> (or false false false)
false

user> (or nil nil)
nil

user> (or false nil)
nil

user> (or true nil)
true

;; or doesn't evaluate if the first value is true
user> (or true (println "foo"))
true

;; order matters
user> (or (println "foo") true)
foo
true
```
user> (or true false false) true user> (or true true true) true user> (or false false false) false user> (or nil nil) nil user> (or false nil) nil user> (or true nil) true ;; or doesn't evaluate if the first value is true user> (or true (println "foo")) true ;; order matters user> (or (println "foo") true) foo true
link | changes
```
;; See examples for "if" explaining Clojure's idea of logical true
;; and logical false.
```
;; See examples for "if" explaining Clojure's idea of logical true ;; and logical false.

Source clojure/core.clj:789 top

(defmacro or
  "Evaluates exprs one at a time, from left to right. If a form
  returns a logical true value, or returns that value and doesn't
  evaluate any of the other expressions, otherwise it returns the
  value of the last expression. (or) returns nil."
  {:added "1.0"}
  ([] nil)
  ([x] x)
  ([x & next]
      `(let [or# ~x]
         (if or# or# (or ~@next)))))

Vars in clojure.core/or:

Used in 0 other vars

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or

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2 Examples top

See Also top

Source clojure/core.clj:789 top

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