代码永远不会输入任何if语句

Question

begin
  selected_option = gets.chomp
  if selected_option == 1
    puts "Welcome to the Welcome Screen!"
  elsif selected_option == 2
    puts "This is the options menu."
  elsif selected_option == 3
    puts "Logging out. Goodbye!"
  else
    puts "Please select a valid option."
  end  
end while not selected_option == 3

我输入1或2或3，我总是得到＆＃34;请输入有效选项＆＃34;信息。我猜这是因为chomp方法将输入检索为字符串。

围绕这些sans使用选项周围的引号？

Answer 1

gets.chomp.to_i

将其转换为整数。

您可能还想使用开关：

begin
  selected_option = gets.chomp.to_i
  case selected_option
    when 1
      puts "Welcome to the Welcome Screen!"
    when 2
      puts "This is the options menu."
    when 3
      puts "Logging out. Goodbye!"
    else
      puts "Please select a valid option."
  end  
end while not selected_option == 3