# mod 模运算符 MOD,是一个数学运算符号。指**取模运算符**,算法和取余运算(REM)相似例如: * a mod b=c, * in programming : `c = a % b` 表明a除以b余数为c。 $\frac{(a-c)}{b} = Q(Quotient)$ “同余”,数论中的重要概念。在整数的除法中,只有能整除与不能整除两种情况。
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