Float
Cai Gengyang
gengyangcai at gmail.com
Sat Jul 30 07:44:42 EDT 2016
You mentioned that : A floating point number[2] is number that is not an integer (and not a
complex number)
Hence ,
10 is not a floating point number because it is an integer
25 is not a floating point number because it is an integer
7 + 3i is not a floating number because it is a complex number
8 + 5i is not a floating number because it is a complex number.
Is 3.0 a floating number ? It is a rational number, not an integer right ?
On Saturday, July 30, 2016 at 6:34:25 PM UTC+8, Steven D'Aprano wrote:
> On Sat, 30 Jul 2016 08:21 pm, Cai Gengyang wrote:
>
> > Cool ... can you give a concrete example ?
>
> A concrete example of a float?
>
> I already gave two:
>
>
> >> Python floats use 64 bits (approximately 18 decimal digits). Because the
> >> decimal point can "float" from place to place, they can represent very
> >> small numbers:
> >>
> >> 1.2345678901234567e-100
> >>
> >> and very big numbers:
> >>
> >> 1.2345678901234567e100
>
>
> Here are some more:
>
> 0.5 # one half
> 0.25 # one quarter
> 7.5 # seven and a quarter
> 0.001 # one thousandth
>
> 12345.6789
> # twelve thousand, three hundred and forty-five, point six seven eight nine
>
> -1.75 # minus one point seven five
> 0.0 # zero
> 3.0 # three
>
> 1.23e45 # one point two three times ten to the power of forty-five
>
>
>
>
> --
> Steven
> “Cheer up,” they said, “things could be worse.” So I cheered up, and sure
> enough, things got worse.
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