与数值类型相关的其他两个重点是常量(如上例中的100，只是明确表达的数字)和位运算。
Two other important points related to the numeric types are literals, which are just explicitly expressed Numbers, like 100 in the previous examples, and bit operations.
我们强烈建议明确将这些参数值改为合法的组名，以便防止未授权的访问。
We highly recommend explicitly changing the value of these parameters to valid group names in order prevent unauthorized access.
作为程序的一部分，具有明确的数值称之为常量。
An explicit data value that appears as part of the program is called a constant.
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