If the source value is nan not a number , infinity , or too large to be represented as a 如果源值为nan （非数字值） 、无穷大或因过大而无法表示为
Gets the invalid number that is a positive infinity , a negative infinity , or not - a - number 获取无效数字，它可以是正无穷大、负无穷大或非数字( nan ) 。
Many routines designed to read floats may allow values such as " nan " not a number 许多设计用来读取浮点数的例程可能会允许“ nan ” （非数字）这样的值。
That part of a character code used with the numeric coding to represent nonnumeric information 字符代码的一部分，它和数字一起编码，用来代表非数字信息。
The source value is infinity , not - a - number , or too large to be represented as the destination type 的转换，源值为无穷大、非数字( nan )或太大以至无法表示为目标类型。
The exception that is thrown when a floating - point value is positive infinity , negative infinity , or not - a - number 当浮点值为正无穷大、负无穷大或非数字( nan )时引发的异常。
If it is , it parses the string until it reaches the end of the number , and returns the number as a number , not as a string 如果是，则执行到第一个非数字字符时结束，并将结果返回为数字。
Is available for programming languages that do not support the concepts of infinity and not - a - number in floating - point operations 在进行浮点运算时不支持无穷和非数字值的概念的编程语言中可用。
So the set top box will contain a freeview digital television receiver , giving owners access to 30 terrestrial digital channels 报道说，英国电信将为用户提供包括所有主要数字和非数字电视频道在内的节目套餐。
Note how the regular expression above captures only digits and dots , after " connection from " and a string of non - digits 请注意，上面的正则表达式如何只捕获“ connection from ”和一个非数字的字符串后面的数字和点。
