Why python give result in float?

Answer 1

If you mean in 3.x vs 2.x ...
https://www.python.org/dev/peps/pep-0238/#motivation

I'm still reading, but the first thing that pops out at me is 'because surprise integers'.

Python is *dynamically* typed so (in 2.x) a calculation you expect to remain in floating point could suddenly truncate to integer floor division if any part converted to an integer. Basically I think they're enforcing 'true division' in 3.x instead of flipping suddenly to the status quo popular when 2.x was born (Java/C more rigidly by static type).

edit: You might want to read that link; the other reasons are also compelling.

Answer 2

It gives a float result as default. If you want to get an int, use a double back slash "//".
print(10 / 5) # 2.0
print(10 // 5) # 2