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| From: Thomas Bushnell BSG <tb@xxxxxxxxxx> | Date: Thu, 02 Jun 2005 08:23:36 -0700 | | Aubrey Jaffer <agj@xxxxxxxxxxxx> writes: | | > So in a Scheme implementation which has "arbitrarily big" precision, | > how many digits is (sqrt 2)? How many digits is (sin 7/5)? | | There is no function "precision-of", so there is no need for an | answer. Arbitrarily big precision arithmetic (generally) works pretty | well; you carry around symbolic representations and operate on them. To first order: (define (precision-of x) (string-length (number->string x))) R5RS requires all numbers to have external representations; and it specifies the allowed formats.