minus sign negative的意思|示意

If the pattern specifies a leading minus sign for negative input, a trailing minus sign is ignored.

如果该模式指定前置负号为负输入，后置负号将被忽略。

A negative value is prefixed by a minus sign.

一个负数将以减号作为前缀。

For patterns with a leading minus sign (negative prefix), truncation occurs at the point of a nondigit character, including embedded minus signs.

对于带前置负号(负前缀)的模式，截断发生在非数字字符的点(包括了内嵌的负号)。

When there's no explicit negative pattern, a leading minus sign is assumed in combination with the positive pattern.

没有显式的负数模式时，假设正数模式中包含前置的负号。

Don't depend on the lack of a minus sign to mean that there are no negative Numbers.

不要根据没有减号这一条件就认为不会有负数。

If the integer is negative, you write a minus sign before the number, just as in mathematics.

如果是一个负数，在数字前面加上“-”即可，就和数学中是一样的。