# 数字运算符

• +， - ，*和/。加法，减法，乘法和除法运算符（在 VFP 中没有整数除法，可以将结果转换为带有函数 INT()，CEILING（）和 FLOOR() 的整数。
• ％模数运算符。
• ^和**。运算符的力量。他们都做同样的事情。
• （）。分组运算符。
• 运算符优先。订单是：
>    ( )
>    ^ (or **)
>    / and *
>    - and +
> 

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? 10 / 5 + 2 && Outputs 4
? 2 + 10 / 5 && Outputs 4 as well. Division has precedence.

* Both multiplication and division have same precedence
* They would be interpreted from left to right.
? 4 * 5 / 2 + 5 && Outputs 15
* Use parentheses whenever you are in doubt or want to be explicit
? ( (4 * 5) / 2 ) + 5 && Outputs 15. Explicit grouping of operations

? 4 * 5^2 && ^ has precedence, this is same as 4 * (5^2) = 100.
? (4 + 5)^2 && Using parentheses we say add 5 to 4 (9) and then square = 81.