clojure.core/int?

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Type: function Added: Clojure 1.9 Examples: 2 Runnable: 0

([x])

Return true if x is a fixed precision integer

Examples

by timgilbert on 2017-05-24 . May have evaluation errors. ▶

;; Note that this will return true for things which aren't strictly Java ints: (int? 42) ;; => true (int? (java.lang.Integer. 42)) ;; => true (int? (java.lang.Long. 42)) ;; => true (int? 42.0) ;; => false (int? (bigdec 42)) ;; => false ;; The distinction between int? and integer? is that integer? will return true ;; for BigInts: (int? (bigint 42)) ;; => false (integer? (bigint 42)) ;; => true (int? java.math.BigInteger/ONE) ;; => false (integer? java.math.BigInteger/ONE) ;; => true

by liuchong on 2019-10-30 . May have evaluation errors. ▶

;; Here is the definition, it's simple (and 呵呵哒): ;; ;; (defn int? ;; "Return true if x is a fixed precision integer" ;; {:added "1.9"} ;; [x] (or (instance? Long x) ;; (instance? Integer x) ;; (instance? Short x) ;; (instance? Byte x))) ;; (int? (Long/MAX_VALUE)) ;; => true (int? (Long/MIN_VALUE)) ;; => true (int? 0.0) ;; => false

See also

• clojure.core/integer? (3)
• clojure.core/number? (4)
• clojure.core/pos-int?
• clojure.core/neg-int?
• clojure.core/nat-int? (1)

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