模数除以10的倍数

Question

I'm currently doing a practice where I'm given a non-negative number "num", and return true if num is within 2 of a multiple of 10.

I have the idea of an if statement which would include the below, but a more working / similar version;

if (num-2 >= (num % 10 == 0) <= num+2);

Seems like I'm trying to create a variable with all multiples of 10, however this seems a bit overkill. I feel it's basic arithmetic with something like num-2 >= x <= num+2, where x is a multiple of 10, but what is the solution?

Answer 1

您正在寻找以0、1、2、8或9结尾的数字

if (num % 10 <= 2 || num % 10 >= 8)