Java 找不到simbol错误

我一直在用java.util.scanner进行实验，但我遇到了一个错误，您能帮我

The error as said in Command Prompt:
 18: error :cannot find simbol
   if (answer.equalsignoreCase("yes));
       ^
symbol: variable answer

这就是我从命令提示符中得到的错误，下面是我编写的代码：

import java.util.Scanner;
import java.io.IOException;
class bikeGame {
 public static void main(String[] args){

 Scanner scanner = new Scanner(System.in);

 boolean brakes = false;
 byte speed = 5;
 byte gear = 1;

 String start = " Your current speed is 5km/h. You are in the first gear.";
 String welcome = "Welcome to Bike Rider! You can use the commands 'faster', 'slower' and 'brakes'. Type   'start' to begin...";
 String die = "You died, type 'start' to play again...";
 System.out.println(welcome);
 String input = scanner.nextLine();
 System.out.println("You selected " + input + "? Is this correct? <true or false>");
 if (answer.equalsgnoreCase("yes"));
 System.out.println(start);
 float b;
 float c;
 float d; 



 Scanner myScanner = new Scanner(System.in);

 b = myScanner.nextFloat();
 c = myScanner.nextFloat();
 d = myScanner.nextFloat();



 }
}

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如果您看到问题，请毫不犹豫地回答…

您没有声明变量答案，而是使用了它：

if (answer.equalsgnoreCase("yes"));

也许，您想将输入命名为答案

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附言：不是.equalsIgnoreCase，是.equalsIgnoreCase。

您至少可以发布错误。。。我得到一个错误是没有帮助的请阅读底线…这是什么：如果回答。equalsgnoreCaseyes；一个条件，它除了调用和函数外，什么都不做，我们对一个没有声明的对象答案一无所知……用输入代替答案。@user2483123什么底线？