[FIXED] Boolean operators

Issue

I'm trying to figure out if a year is a leap year or not I wrote this code, but I don't understand why it work, when I input 1996 it's "true" and when I enter 1700 it's "false" but why doesn't the "and" function returns false on 1996? shouldn't it check the left side and return a "false" ? ps. I work with anaconda3.2020-02:

bool(((x%100 == 0) * x%400 == 0) and x%4 == 0 )

Solution

I'm not sure why you are using * at all. The expression you want is

x % 400 == 0 or (x % 100 != 0 and x % 4 == 0)

(bool is a subclass of int and True == 1, so and is sort of like and, but True * True is 1, not True, and True + True is 2, not True or even 1. Don't use arithmetic with Boolean values.)

Answered By - chepner