Why output is -5.🤔

Question

print(-9//2) #output=-5 but why,can you explain me this.

Answer 1

The // operator explicitly floors the result. Floors means that it returns the largest integer less than or equal to the result.

In your case, the implicit result through classic division is -4.5, which is floored to -5 (as it is smaller than the result).

Works same as the math.floor() function, normally.

Answer 2

Maninder Singh,

As -9 isn't divisible by 2 so, it will try to find a number "less than" -9 that is divisible by 2 i.e., it will move towards left on the real number line.
And, there it will catch -10, which is surely divisible by 2.

So, -9 // 2 = (-9-1) // 2 = -5
That makes your answer!