Hello Coders, I am expecting 1.1 by this code "print(1.2-0.1)" but the result is 1.9999999999..., What is wrong Coders?

Answer 1

This is because, in python, 0.1 is not exactly 0.1. if you print 0.1 with 60 decimal point, you will see what I mean.

```
print(f"{0.1:.60f}")
```

The code above will show you that 0.1 is not precisely 0.1 but it much bigger that the actual value.

Or you can use Decimal from decimal module to see the actual value for each floating number. For example:

```
from decimal import Decimal
print(Decimal(0.1))
```

So one of the solution is to use round() function.

```
a = 1.2
b = 0.1
r = round(a-b, 2) # we round off our result on 2 decimal places

print(r)
```

Answer 2

Wikipedia covers the floating point atithmetics pretty well https://en.m.wikipedia.org/wiki/Floating-point_arithmetic

Answer 3

Thanks for replying but i solved it.