If the first argument is not negative, no sign character appears in the result.

如果第一个参数不为负，结果中不会出现符号字符。

youdao

The Unicode character copyright sign character 0xA9 = 1010 1001 is encoded in UTF-8 as

Unicode 字符版权标记字符 0xA9 = 1010 1001 用 UTF-8 编码如下所示

youdao

The "e", "e -", "e", or "e -" formats indicate that a sign character should only precede negative exponents.

或“e -”格式指示符号字符仅置于负指数前面。

youdao

And they may be just saying that to make me feel better, which, again, is a sign of their character and their class.

WHITEHOUSE: Presidential Press Conference

Today -- having virtually disappeared from the movies -- the cigarette is a sign of stunted growth, a crutch that Kym, Hathaway's character in "Rachel Getting Married, " can't put aside.

CNN: Review: Hathaway dazzles in 'Rachel'