我創建了兩個函數 (F1和F2)F1創建一個隨機答案F2應該對生成的答案進行反饋F1( if(antw == ant)我的問題是如何使用生成的F2隨機答案F1 ，以便反饋正確？var operators = ['+','-'];function F1(){        Z1 = document.getElementById("Z1");        Z2 = document.getElementById("Z2");        oper=document.getElementById("operator");        answer=document.getElementById("answer");                rZ1 = Math.floor((Math.random()*10));        rZ2 = Math.floor((Math.random()*10)+1);        op = operators[Math.floor(Math.random()*2)];                Z1.innerHTML=rZ1;        Z2.innerHTML=rZ2;        oper.innerHTML=op;        answer.innerHTML = eval(rZ1 + op + rZ2);      }document.getElementById("button2").addEventListener("click", F2);function F2(){    antw = parseInt(document.getElementById("userAnswer").value, 10);    feedBack = document.getElementById("feedBack");    ant = document.getElementById("answer");    {    if(antw == ant) {    feedBack.textContent = "right";    } else {    feedBack.textContent = "wrong";    }}   };<button onclick="F1()"> New </button><p>         <label id="Z1"> </label>         <label id="operator"> </label>    <label id="Z2"> </label>      = <input id = "userAnswer" type=text>        <button id = "button2" >answer</button></p>   <p id = "feedBack"> </p><p><label id="answer"> </label></p>