1. 7 // 2 is floor division and gives the integer 3.
2. 7 / 2 is true division and always gives a float, here 3.5.
3. -7 // 2 floors -3.5 downwards to -4, so the line prints 3 3.5 -4.

Answer: 3 3.5 -4.

Python 3 separates true division from floor division, and floor division rounds towards minus infinity. That last rule is what makes the negative case differ from C, where the same expression gives -3.

Shortcut. / always returns a float (3.5) and // floors towards minus infinity, so −3.5 becomes −4, not −3.

Common trap. "3 3.5 -3" truncates −3.5 towards zero as C does; Python's // rounds down, to −4.