SyntaxError：missing; for-loopイニシャライザの後に

Question

が見つかりました。 for-loopの後に。助けてくれてありがとう。

function checkAttempt(){ 
     var studentID = document.getElementById("studentID").value; 
     var attempt = 0; 

     for (attempt < 3 && studentID == localStorage.studentID){ 
      gradeTest; 
      attempt = attempt + 1; 
      localStorage.attempt = attempt; 
      }  
     } 

Answer 1

whileでforを置き換えます

function checkAttempt(){ 
    var studentID = document.getElementById("studentID").value; 
    var attempt = 0; 

    while (attempt < 3 && studentID == localStorage.studentID{ 
     gradeTest; 
     attempt = attempt + 1; 
     localStorage.attempt = attempt; 
    }  
}