Exact expt

This tests whether exponentiation of exact numbers produces an exact result. The test expression was (expt 1/3 3), except on systems without inexact rationals, where (expt 3 3) was substituted.

Exact exponentiation supported: Racket, Gauche, MIT, Gambit, Chicken with the numbers egg, Bigloo, Scheme48/scsh, Guile, Kawa, SISC, Chez, Vicare, Larceny, Ypsilon, Mosh, IronScheme, STklos, KSi, TinyScheme, Scheme 9, RScheme, S7, XLisp, Rep, UBM, Sizzle, Oaklisp, Sagittarius, Picrin, Owl Lisp, Chibi

Only inexact exponentiation supported: plain Chicken, SCM, NexJ, JScheme, Unlikely, Elk, SXM, Dfsch, Inlab

No support or broken support for expt: SigScheme, Shoe, Mini-Scheme, SIOD, Schemik, Llava, FemtoLisp, LMU

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