Ruby 新手 - IRB 中的 While 循环问题 [英] New to Ruby - While loop issues in IRB

问题描述

所以几天前我决定尝试学习 Ruby，它实际上进展得非常好.我大部分时间都在 IRB 中摆弄，直到找到一个重要的程序来编写代码来测试我的知识.

So a few days ago I decided I would try and learn Ruby and it's actually been going pretty well. I've been mostly fiddling around in IRB until I can find a non-trivial program to code to test my knowledge.

然而，今天我遇到了一个关于 While 循环的意外问题，我希望你们能帮我解决这个问题:

However, today I ran into an unexpected issue with a While loop and I was hoping y'all could help me out with this:

irb(main):001:0> i = 0
=> 0
irb(main):002:0> while (i < 1000)
irb(main):003:1> i++
irb(main):004:1* end
SyntaxError: (irb):4: syntax error, unexpected keyword_end
        from C:/WINDOWS/Ruby/bin/irb:12:in `<main>'

为什么这不像我期望的那样工作?根据 本网站，我的结构正确，所以我错过了什么在这里?

Why exactly isn't this working as I'm expecting it to? According to this site I have the structure correct, so what am I missing here?

如果有帮助的话，我在 Windows XP 下运行 Ruby 1.9.2.

I'm running Ruby 1.9.2 under Windows XP, if that's of any help.

推荐答案

i++ 不是有效的 ruby​​.你需要做 i += 1.

i++ is not valid ruby. You need to do i += 1.

请参阅 Mladen 关于解析器所见内容的评论.

See Mladen's comment as to what the parser is seeing.

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