"amt" <0101...@gmail.com> wrote in message
I am honestly confused. I have read the exercise and found
three lines that could use the floating point(2,3 and line 5).
I can understand why at line 5 I use floating point. 6,75 is more
precise than saying 7.
Exactly, no problem with line 5 (except the odd comment about 6.83)
But I can't understand at line 2 and 3. I mean it makes no
difference
for me. Saying 30 or 30.0 is the same thing.
As well as saying 97 or 97.0.
Precisely, thats why I asked the question.
print "Roosters", 100 - float(25) * 3 % 4
This is for line 3 so it is more precised.
In what way do you think this is more precise?
As I said, I am confused when it comes to line 2 and 3.
But I think having more digits after the " ." makes it more
precise.
It depends on the definition of precision.
As per a recent thread floating point numbers are
less precise in an absolute sense for integer values
because they are stored as approximations, but the
representation with multiple decimal places is a
greater precision mathematically speaking.
I don't understand your comment on line 5.
Why would the answer be 6.83?
The answer at line 5 is 7 because I have integers
and I think Python approximates.
It doesn't approximate but it does use integer
arithmetic exactly.
I have done line 5 with pencil and paper:
3 + 2 + 1 - 5 = 1, 1+ 4%2 = 1, 1 - (1/4)= 1, 1 + 6 = 7
Right, that's the integer version.
If I use floating point the right answer will be 6,75
but I don't know how to get to this answer.
3 + 2 + 1 - 5 = 1,
1+ 4%2 = 1,
1 - (1/4)= 1, -> 1 - 0.25 = 0.75
0.75 + 6 = 6.75
HTH,
--
Alan Gauld
Author of the Learn to Program web site
http://www.alan-g.me.uk/
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