.. 和 ... 和有什么不一样? [英] What is the difference between .. and ...?

问题描述

标题一目了然:什么时候应该使用双点..，什么时候应该使用三点...?两者都用于表示范围.

The title is pretty much self-explanatory: When should one use the double-dots .. and when the triple-dots ...? Both are used to indicate a range.

推荐答案

While range with 双点 不包括结束边界，三点用于包含范围，即 (0...2) 将包含 2以及.这现在已经过时了；为此使用 ..=代替目的.

While ranges with double dots don't include the end bound, triple dots were used for inclusive ranges, i.e. (0...2) would contain 2 as well. This is now obsolete; use ..= for this purpose instead.

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