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master
bit_manipulation/is_even.py
37 строк
834 B
Rahid Zeynalov
Typo deicmal -> decimal (#11169)
25 ноя 2023, 14:25
Не верифицирован
25 ноя 2023, 14:25
5898b96
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def is_even(number: int) -> bool: """ return true if the input integer is even Explanation: Lets take a look at the following decimal to binary conversions 2 => 10 14 => 1110 100 => 1100100 3 => 11 13 => 1101 101 => 1100101 from the above examples we can observe that for all the odd integers there is always 1 set bit at the end also, 1 in binary can be represented as 001, 00001, or 0000001 so for any odd integer n => n&1 is always equals 1 else the integer is even >>> is_even(1) False >>> is_even(4) True >>> is_even(9) False >>> is_even(15) False >>> is_even(40) True >>> is_even(100) True >>> is_even(101) False """ return number & 1 == 0 if __name__ == "__main__": import doctest doctest.testmod()