What are whole numbers? 什么是整数？

　　Whole numbers are natural numbers and zero. 整数是零和自然数。

　　Natural numbers are the numbers when you count something. 自然数是计算时用到的数。

　　Thus, whole numbers start from zero. 因此，整数从零开始。

　　And the next numbers are one, two, three, four and so on. 紧接在后的数是1、2、3、4等等。

　　What is the rule for whole numbers? 整数的法则是什么？

　　First, it should be zero or bigger than zero. 第一，它必须是零或比零更大的数。

　　Second, the number doesn't have a decimal point. 第二，这个数没有小数点。

　　For example, 2.5 can't be a whole number. 例如，2.5就不是整数。

　　Third, every whole number has its next whole number. 第三，所有的整数都有紧接在后的整数。

　　Whole numbers are used to count time, dates, money and so on. 整数被用来计算时间、日期、钱等等。