Python math error

[nadirdogan]

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...

1 2 3 4 5 6 7 8 9

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???

[buran]

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

[ka06059]

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

[nadirdogan]

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...