javascript - Require user to choose 'boy' or 'girl' -

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I am trying to answer the question to my user "Are you a boy or a girl?" With one of those two options and forcing them to choose one or the other.

I think I am going in the right direction, but whenever I run my code, when I choose the second option, this hitchie

What am I doing? 

  var gender = sign ("Are you a boy or a girl?"). ToLowerCase (); While (gender! == ("boy" || "girl")) {gender = sign ("please only respond to the boy or girl now, are you a boy or a girl?"); }    
 
 
 appropriate status  
  will be (gender! == 'boy' & gender! == 'girl') {  
 That's because  ("boy" || "girl")  always " Boy ", so the  looks like  while  while (gender! == 'boy') . In this case  ||  is called "default" operator, logical or a stunning use. If the value on the left is true, then it will use the value to the left. Otherwise, it will evaluate (hence "default") on the right side.

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