当用户输入时，如何终止这个Ruby`while`循环；否；？

我正在开发一个程序，它给用户提供两个从0到10的随机数，供用户进行除法、乘法、加法或减法

在每个问题之后，用户都有机会通过键入

no

停止程序

我正在使用

while

循环来实现这一点，但是当用户输入

no

时，我无法使循环终止。如何让程序正确响应用户输入

def math_num
  nums = [num_1 = rand(1..10), num_2 = rand(1..10), operator = ["+", "-", "/", "*"].sample]
  problem = "What is #{num_1} #{operator} #{num_2}?"
  puts problem

  $input = gets.to_i
  $answer = num_1.send(operator, num_2)

  puts $input == $answer ? "You answered #{$input}, and the answer is #{$answer}! You are correct!" : "The answer is #{$answer}, not #{$input}! You are incorrect!"   

  def try_again
    puts "Would you like to do another question?"
    another = gets.chomp.to_s
    while another != "no"
        math_num
    end
  end

  try_again 

end

math_num

---

好的，你这样做的方式就是得到一个无限循环，因为

另一个
变量的值在
循环中没有被更新

请尝试以下方法：

def math_num
    while true
        nums = [num_1 = rand(1..10), num_2 = rand(1..10), operator = ["+", "-", "/","*"].sample]
        problem = "What is #{num_1} #{operator} #{num_2}?"
        puts problem

        $input = gets.to_i
        $answer = num_1.send(operator, num_2)

        puts $input == $answer ? "You answered #{$input}, and the answer is #{$answer}! You are correct!" : "The answer is #{$answer}, not #{$input}! You are incorrect!"   

        puts "Would you like to do another question?"
        another = gets.chomp.to_s
        if another == "no"
            break
        end
    end
end

math_num

您可以将其替换为
if
语句，而不是
while
循环<代码>如果是另一个！=“不”
@philipyoo这也行！向上投票。