Python question

Question

n=int(input())
k=0
b=1
while k<=n:
m=1/(10**k)
k+=1
b+=m
print ("m=",m)
print ("b=",b)
When I input 3 into this code, the output, I think, should be 2.111, but it's not. Instead, the output is 2.11099..Could somebody explain to me why?

Answer 1

This is because floating-point numbers can be represented to a certain degree of precision only, using the computer's undercore binary system:
https://en.m.wikipedia.org/wiki/Floating-point_arithmetic#Accuracy_problems

Answer 2

Thank you very much.

Answer 3

Sava this is a common issue in python. Google "python float precision" or visit: https://docs.python.org/3/tutorial/floatingpoint.html for more detail!