Why computer did not store float accuretly

Answer 1

Due to binary system, computer can never calculate faction to 100% accurate.

Answer 2

The problem is not only in computers.

Computers use base 2 numbers and we use base 10.
Every base has problematic numbers.

A problematic number in base 10 is one third
(1/3)

We can not write it accurately. 0.333333333 is not accurate.

Base 2 also has problematic numbers.

However, you can use decimal data types for the precision. (note: they function very differently but are more accurate)

Answer 3

thanks