0

# What's the difference? -11//3 and 11//3

5 Answers

+ 4

In programming there is a concept called flooring, which means rounding a decimal number to the smaller integer, which means that for example flooring value -4.1 would yield -5.0, which might surprise beginners who may think that floor division is same than integer division.
In math module there is a function called floor:
from math import floor
which can be used to floor decimal numbers:
floor(9.81) -> 9
floor(4.00) -> 4
floor(0.99) -> 0 ...continuing soon... finished.
floor(-2.55) -> -3
floor(-8.00) -> -8
Python's floor division is *about* equal to flooring normal division:
x//y == floor(x/y)
and why I say about equal, is because x//y and floor(x/y) don't always produce number of same type. x//y will be float if either x and y is float, but floor(x/y) is always integer.

+ 3

ceil points to positive infinity.
floor points to negative infinity.
That's why floor of a negative number becomes a bigger negative number.
ceil
^
positive num
v
floor
---------0--------- zero
ceil
^
negative num
v
floor

+ 2

This operator will divide the first argument by the second and round the result down to the nearest whole number,
-4 is lower than -3

+ 1

Thanks Shmuel Kroizer and Seb TheS . I learned something new today from you. thank you

+ 1

CYBER-B Are you saying that -11 // 3 yields -4, because -3.66666... is closer to -4 than -3? Then why -10 // 9 yields -2?

Hot today

help my code does not iterate

0 Votes

What is the problem 🤨🧐??

1 Votes

Generador de divicion python.

1 Votes