Ruby语法错误，意外的$end

从昨天开始，我就一直在用一些Ruby在CodeCademy上玩，我觉得自己好像稍微掌握了一些，但有几个问题变得显而易见

这个代码有什么问题？我一直收到一个错误：

（ruby）：15:语法错误，意外$end，应为关键字\u end

---

有两个

if

语句没有相应的

end

if grade > 1
  puts "You're just making that up! Really?"
end

及

另一方面，我认为您需要的是

put

而不是

print

此外，当您有一个布尔值时，您不需要这样做

if my_boolean == true
  # do something
end

这和做同样的事情

if my_boolean
  # do something
end

---

最后，布尔值只有两个可能的值，

true

和

false

。最后的

else

语句没有意义，因为只要

answer==true

，它就会被激活，而您已经有了这样的理由。

通过适当的缩进，它就会变得清晰

print "What grade did you get on your final?"
grade = gets.chomp
if grade > 1
  puts "You're just making that up! Really?"
  answer = gets.chomp
  yes = true
  no = false

  if answer == true
    print "Oh, that's awesome!"
    if answer == false
      print "Dang, I thought you were serious."
    else
      print "What? I don't understand."
    end

---

Ruby中的每个

if

都需要相应的

end

。您有三个

if

s，只有一个

end

。因此，只有最后一个

if answer==false

有一个匹配的

end

，其他的则需要两个。

您需要每个

if

都有一个end。 您可以这样做：

puts "What grade did you get on your final?"
grade = gets.chomp

if grade > 1
  puts "You're just making that up! Really?"
end

answer = gets.chomp

if answer == "yes"
  print "Oh, that's awesome!"
elsif answer == "no"
  print "Dang, I thought you were serious."
else
  print "What? I don't understand."
end

或者可以是这样，您不需要使用

end

puts "What grade did you get on your final?"
grade = gets.chomp

# HERE
puts "You're just making that up! Really?" if grade > 1

answer = gets.chomp

if answer == "yes"
  print "Oh, that's awesome!"
elsif answer == "no"
  print "Dang, I thought you were serious."
else
  print "What? I don't understand."
end

---

欢迎使用Stack Overflow，请确保您访问了该页面和该页面。我是这样做的：（粘贴代码）但仍然不确定如何使else语句工作的。我希望它说“什么？我不明白。”如果用户输入的不是“是”或“否”。我考虑了| |函数，但不确定该函数如何正常工作。您希望与用户所说的进行比较

answer==“yes”

然后你可以做一个

els如果answer==“no”

，那么你可以使用你的

else

语句。

puts "What grade did you get on your final?"
grade = gets.chomp

if grade > 1
  puts "You're just making that up! Really?"
end

answer = gets.chomp

if answer == "yes"
  print "Oh, that's awesome!"
elsif answer == "no"
  print "Dang, I thought you were serious."
else
  print "What? I don't understand."
end

puts "What grade did you get on your final?"
grade = gets.chomp

# HERE
puts "You're just making that up! Really?" if grade > 1

answer = gets.chomp

if answer == "yes"
  print "Oh, that's awesome!"
elsif answer == "no"
  print "Dang, I thought you were serious."
else
  print "What? I don't understand."
end