[Tutor] Picking Nits in "Learning to Program"

Roel Schroeven rschroev_nospam_ml at fastmail.fm
Sat Feb 17 02:47:56 CET 2007

Carroll, Barry schreef:
> In "Learning to Program", look at "The Raw Materials", "Real
> Numbers".  The first sentence, "These are fractions" is technically
> incorrect, but incomplete.  While it's true that fractions (i.e.
> rational numbers) are real numbers, there are far more real numbers
> that cannot be expressed as a ratio of two integers.  Hence the name
> "Irrational Numbers".  The square root of two is the prime example.
> (Sorry, can't do the math symbol in Plain Text.)
> You might say something like, "Fractions are examples of real
> numbers."

Notwithstanding my other mail, it might be better to use another term. 
Alan, you already use the name 'floating point numbers' in that section; 
I think it's a bit better to always refer to those numbers by that name, 
and mention 'real numbers' as an alternative name. The opposite of the 
current situation more or less actually.

If I have been able to see further, it was only because I stood
on the shoulders of giants.  -- Isaac Newton

Roel Schroeven

More information about the Tutor mailing list