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Aubrey Jaffer <agj@xxxxxxxxxxxx> writes: > Yes, I should have written "inexact numbers". Ok, but when we speak of symbolic "infinite precision" representations of sqrt(2), presumably we are using exact numbers. > Can number->string return a string which can't be READ as a number? > > I had thought that 6.2.4 "Syntax of numerical constants" and 7.1.1 > "Lexical structure" applied to the results of NUMBER->STRING. If they > are independent, a note about that should be added to the report. I think they do, but implementations certainly can extend the syntax of numbers if they wish (provided that NUMBER->STRING, STRING->NUMBER, and READ all behave in the expected way). Thomas