数字运算符

Created: November-22, 2018

数字运算符最简单，几乎与其他语言相同。

+， - ，*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 +

    ? 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.