The documentation for (number->string z radix) is a bit sparse:
"Returns a string that is the printed form of z in the base specified
by radix. If z is inexact, radix must be 10, otherwise the
exn:fail:contract exception is raised."

In the case that z is inexact, are we guaranteed that it will always
print as "<Sign>?<Digit>+<Dot><Digit>+" and never use... (a) the
#i<Digit>+ format, (b) scientific notation, (c) not have a leading 0,
and so on?

Essentially, I would like to know that (number->string z 10) on an
inexact is equivalent to (real->decimal-string z +inf.0) (if infinity
were a legal value for the length of the decimal.)

If not, there doesn't seem to be another function that reliably prints
out floats.

Jay

-- 
Jay McCarthy
Associate Professor
PLT @ CS @ UMass Lowell
http://jeapostrophe.github.io

           "Wherefore, be not weary in well-doing,
      for ye are laying the foundation of a great work.
And out of small things proceedeth that which is great."
                          - D&C 64:33

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