余数，数学用语。在整数的除法中，只有能整除与不能整除两种情况。当不能整除时，就产生余数，取余数运算：a mod b = c(b不为0） 表示整数a除以整数b所得余数为c，如：7÷3 = 2 ······1。
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双语例句原声例句
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9减4，余数为5。
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“如今，残余数量下降了75%。”餐厅经理告诉湖南晚报。
"Now, the amount of waste is down by 75 percent," the cafeteria's manager told Hunan Evening Paper.
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该余数与 0 比较（如果余数是 0，那么该数可以被 3 整除）。
That remainder is compared to 0 (it is the remainder 0 and, thus, num is divisible by 3).
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1%10 So if you actually do in a program 11 percent 10, 1 what you'll get back is 1 because that is in fact the remainder of that arithmetic operation.
如果在编程里就是，返回,因为1是这个计算式的余数。
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STUDENT: What does it mean, the operator used, when you were calculating the remainder between nine and five?
学生：这是什么意思，当你用这个运算符去算,9除以5的余数的时候？
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But we'll use this over time but the percent sign essentially gives you the remainder.
在以后我们会用到,%给你的是余数。
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