int
- (int x)
Coerce to int
© Rich Hickey. All rights reserved. Eclipse Public License 1.0
1 Example
user=> (int 1) 1 user=> (int 1M) 1 user=> (int 1.2) 1 user=> (int \1) 49 user=> (int \a) 97 ;; Strings cannot be cast to an int. user=> (int "1") Execution error (ClassCastException) at user/eval175 (REPL:1). java.lang.String cannot be cast to java.lang.Character ;; Use Java interop instead (Integer/parseInt "1") ;;=> 1 ;; Using JavaScript interop for ClojureScript (js/parseInt "5") ;;=> 5 (js/parseInt "5.22") ;;=> 5
3 Notes
By 
, created 6.8 years ago
, created 6.8 years agoTo convert a string containing a number to an integer, use Java's Integer/parseInt, e.g. (Integer/parseInt "-10").
By 
, created 1.4 years ago, updated 1.4 years ago
, created 1.4 years ago, updated 1.4 years agoThe int function fails to convert a float to a clojure.lang.BigInt. For example (int (* 1.0 111111111111111111)) fails with an IllegalArgumentException exception.
Here is a suggestion to work around this limitation.
(letfn [(-int [x]
(try (int x)
(catch IllegalArgumentException _
(bigint x))
(catch ArithmeticException _
(bigint x))))]
(-int (ceil (sqrt 22056254169643100399065378))))
which evaluates to the BitInt 4696408645939N.
By 
, created 258 days ago
, created 258 days agoBeware, the int function truncates and does not round:
=> (int 15538.999999999998) 15538