ruby 错误 : Not Finding Variable Defined in Loop

Question

我有 Ruby 代码，它在循环中定义了一个变量。

print("What difficulty do you want on a scale of 1-5?\n")
loop do
  difficulty = gets.to_i
  break if difficulty == 1 or difficulty == 2 or difficulty == 3 or difficulty == 4 or difficulty == 5
end
range = 10 if difficulty == 1
range = 100 if difficulty == 2
range = 500 if difficulty == 3
range = 1000 if difficulty == 4
range = 5000 if difficulty == 5

我收到一个错误，变量难度未定义。我认为这是一个来自循环的问题。我不知道如何将其实现为另一种形式来达到相同的目的。有没有办法使变量成为全局变量？我尝试过寻找其他方法以另一种格式制作它，但没有任何帮助。

Answer 1

您可以在循环外部定义它，否则它会受到范围限制。

尝试:

difficulty_range = {
  1 => 10,
  2 => 100,
  3 => 500,
  4 => 1000,
  5 => 5000
}

difficulty = nil

loop do
  print("What difficulty do you want on a scale of 1-5?\n")
  difficulty = gets.to_i
  break if (1..5).include?(difficulty)
end

p difficulty_range[difficulty]