How to calculate a mod b in Python?

Is there a modulo function in the Python math library?

Isn't 15 % 4, 3? But 15 mod 4 is 1, right?


Asked by: Elise873 | Posted: 06-12-2021






Answer 1

There's the % sign. It's not just for the remainder, it is the modulo operation.

Answered by: John977 | Posted: 07-01-2022



Answer 2

you can also try divmod(x, y) which returns a tuple (x // y, x % y)

Answered by: Miranda788 | Posted: 07-01-2022



Answer 3

>>> 15 % 4
3
>>>

The modulo gives the remainder after integer division.

Answered by: Max898 | Posted: 07-01-2022



Answer 4

mod = a % b

This stores the result of a mod b in the variable mod.

And you are right, 15 mod 4 is 3, which is exactly what python returns:

>>> 15 % 4
3

a %= b is also valid.

Answered by: Daisy861 | Posted: 07-01-2022



Answer 5

Why don't you use % ?


print 4 % 2 # 0

Answered by: Jack105 | Posted: 07-01-2022



Answer 6

I don't think you're fully grasping modulo. a % b and a mod b are just two different ways to express modulo. In this case, python uses %. No, 15 mod 4 is not 1, 15 % 4 == 15 mod 4 == 3.

Answered by: Darcy503 | Posted: 07-01-2022



Answer 7

A = [3, 1, 2, 4]
for a in A:
    print(a % 2)

output:

1
1
0
0

Answered by: Eric211 | Posted: 07-01-2022



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