See section 3.1 and 3.2 of the R6RS (http://www.r6rs.org/ <http://www.r6rs.org/> ). Also see section 3.2 of the Racket Reference. An integer result can be inexact. Consider a result whose absolute error is greater than 1. Than rounding it gives an inexact result. For example: #lang racket (= (inexact->exact (round (/ 1.0 1.1e-200))) (round (/ #e1.0 #e1.1e-200))) ; -> #f Jos
________________________________ From: users-boun...@racket-lang.org [mailto:users-boun...@racket-lang.org] On Behalf Of Mark Engelberg Sent: jueves, 29 de septiembre de 2011 23:11 To: users@racket-lang.org Subject: [racket] Question about round I'm a bit baffled by this behavior: > (exact? (round (sin 30))) #f > (integer? (round (sin 30))) #t > How is it possible to have an inexact integer? I would expect the answer to both of these tests to be true. Thanks, Mark _________________________________________________ For list-related administrative tasks: http://lists.racket-lang.org/listinfo/users
