;;;; Combining rationals with floats. ;;; This example assumes an implementation in which ;;; (float-radix 0.5) is 2 (as in IEEE) or 16 (as in IBM/360), ;;; or else some other implementation in which 1/2 has an exact ;;; representation in floating point. (+ 1/2 0.5) => 1.0 (- 1/2 0.5d0) => 0.0d0 (+ 0.5 -0.5 1/2) => 0.5 ;;;; Comparing rationals with floats. ;;; This example assumes an implementation in which the default float ;;; format is IEEE single-float, IEEE double-float, or some other format ;;; in which 5/7 is rounded upwards by FLOAT. (< 5/7 (float 5/7)) => true (< 5/7 (rational (float 5/7))) => true (< (float 5/7) (float 5/7)) => false
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