字面值后的尾随字符标志着它的类型。

A trailing character after a literal value establishes its type.

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注意如果编译器能够正确地识别类型，就不必使用尾随字符。

Note that you don' t need to use the trailing character when the compiler can figure out the appropriate type.

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通过使用s命令并替换一个空替换字符，您可以删除尾随空格。

You can remove trailing blanks from a file by using the s command and substituting a null replacement.

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