系统提示break非法 为什么啊

Question

  <script>    var words=[      "javascript",      "monkey",      "amazing",      "pancake"    ];    var word=words[Math.floor(Math.random()*words.length)];    var answerArray=[];    for(var i=0;i<word.length;i++){      answerArray[i]="_";      }    var remainingLetters=word.length;    while(remainingLetters>0){    };    alert(answerArray,join(" "));    var guess=prompt("Guess a letter,or click cancle to stop playing.");    if(guess===null){      break;    }else if(guess.length !==1){      alert("please enter a single letter.");    }else{    for(var j=0;j<word.length;j++){      if (word[j]===guess) {        answerArray[j]=guess;        remainingLetters--;        }      }    }  }    alert(answerArray.join(""));    alert("Good job! The answer was "+word);  </script> 

Answer 1

break 是跳出循环  你自己看看你写的

Answer 2

一般在js里面，中断方法用return

Answer 3

break应该是用在for循环里的吧！