Python Forum

Hi all,

I'm new at python but seen a math error. (Python 3.6.4)
Please simply run the code below and see the results.
Also you can try with different numbers...

a=86200
while a>0.0001:
    print(a)
    a/=10

a=0.000862
while a<100000:
    print(a)
    a*=10

I got these results;

Output:
86200
8620.0
862.0
86.2
8.620000000000001
0.8620000000000001
0.08620000000000001
0.008620000000000001
0.0008620000000000001

0.000862
0.008620000000000001
0.08620000000000001
0.8620000000000001
8.620000000000001
86.20000000000002
862.0000000000002
8620.000000000002
86200.00000000001

What can you say me about that error???

we can tell you that it's not an error
http://floating-point-gui.de/
https://en.wikipedia.org/wiki/Floating-point_arithmetic
https://docs.oracle.com/cd/E19957-01/806...dberg.html

a simple addition will do, 0.00000000000000001+1, the output is 1.0 .(python 2.7)

(Feb-11-2018, 08:52 AM)buran Wrote: [ -> ]we can tell you that it's not an error http://floating-point-gui.de/ https://en.wikipedia.org/wiki/Floating-point_arithmetic https://docs.oracle.com/cd/E19957-01/806...dberg.html

Dear Buran, thank you for your informations...