Mod: module. Is to take the remainder, such as 5mod3 = 2,100mod11=1and so on. It's pronounced five modes, three left, two left, and one hundred left.
The remainder refers to the undivided part of the dividend in integer division, and the range of the remainder is an integer between 0 and divisor, which is a mathematical term.
In the division of integers, there are only two situations: divisible and non-divisible. When it is not divisible, it will produce a remainder.