The following numerical functions perform calculations. Mathematical and Boolean operators are described in a separate section. Functions differ from operators in that functions pass arguments and return a result, whereas operators return a result by combining two numerical expressions.
下面介绍用于执行计算的数字函数。数学运算符和布尔运算符将在单独的一节中介绍。函数与运算符不同，函数通过传送自变量来返回结果，而运算符是通过组合两个数字表达式来返回结果的。