Mold and remainder

modulus / Take over operations

The calculation method of modulo and operation is the same , as follows ：
Suppose there are integers a and b, So take the mold / The remainder operation is ：
a mod b = a - b[a/b] ([a/b] Denotes the integer quotient )

The difference between remainder and modulus is that [a/b] Value , The difference between the following ：
Take over operations ： In the calculation [a/b] when ,[a/b] towards 0 Direction rounding ; near 0 principle
Modulus operation ： In the calculation [a/b] when ,[a/b] Round to negative infinity ; The principle of making quotient as small as possible ( It doesn't exceed the maximum of the multi quotient value )
Examples are as follows ：

Reference resources ：https://www.jianshu.com/p/5e1a83e8be3b