Calculation output - integer or float

Question

Sometimes Python gives integer as an output of calculation and sometimes a float. What makes a difference?
The reason I ask are some exercises on Sololearn.

Answer 1

It depends on your calculation but this comes to my mind:

using floor division: // returns an integer (rounded down to the nearest integer)
using float division: / returns a float

e.g.
5//2 = 2
5/2 = 2.5

Answer 2

EuroMuslim

I would say this is true for all operators: as soon as a number is a float, a float is returned.

5.0/2 -> 2.5
5.0//2 -> 2.0
5.0*2 -> 10.0
and so on...

You can try it out in the playground.

Answer 3

Yes, as soon as one of numbers here is float the result will ne float.

Answer 4

EuroMuslim also if the result of division of two integers has a reminder the result will be a float. As Denise Roßberg mentioned at the outset

5/2 -> 2.5
5//2 -> 2

Answer 5

One more subtle point is that floor division // returns integer only if both operands are integer.

5//2 = 2
5.//2 = 2.0
5//2. = 2.0

Answer 6

That's understandable.
But...
Lesson 4.1., last question.
If you choose integer as an answer, it says:Try again.

Answer 7

You mean this one?
print(1+2+3+4.0+5)

In this case you adding integers to a float, so the result will be a float.