Question

我正在创建一个名为guess a number的简单程序。我在显示输出时遇到问题。所以我不知道我是否得到了正确的配方。

<body>
<h3> Guess A Number</br> </h3><input type="integer" id="number" size="20"/>
<input type="button" id="guess" value="GUESS" onClick="guess()"/>

<script>
 function guess() {
 var num = document.getElementById("number").value; 
 var answer = Math.floor(Math.Random() * 100 + 1);

 if(num == answer)
     alert("Your guess is correct! The number is" + answer);

 else if(num != answer) 
     alert("Your guess is incorrect! The number is" + answer);

     }

</script>
</body>

Answer 1

生成随机数时出现语法错误。

应该是

Math.random();

但你有

Math.Random();

以下是完整的代码：

<body>
<h3> Guess A Number</br> </h3><input type="integer" id="number" size="20"/>
<input type="button" id="guess" value="GUESS" onClick="guess()"/>

<script>
 function guess() {
 var num = document.getElementById("number").value;
 var answer = Math.floor(Math.random() * 100 + 1);

 if(num == answer)
     alert("Your guess is correct! The number is" + answer);

 else if(num != answer)
     alert("Your guess is incorrect! The number is" + answer);

     }

</script>
</body>

开发Javascript时，请始终打开浏览器的控制台。它会向你展示这个错误。所有浏览器都有控制台。

Answer 2

您的代码是正确的，但您需要使用固定数字测试该函数以查看它是否有效，然后使用Math.random();（小写random() ），在这种情况下，我使用11作为正确的数字..

＆＃13;

 function guess() {
 var num = document.getElementById("number").value; 
 //var answer = Math.floor(Math.random() * 100 + 1);
  var answer = 11;

 if(num == answer)
     alert("Your guess is correct! The number is" + answer);

 else if(num != answer) 
     alert("Your guess is incorrect! The number is" + answer);

     }

＆＃13;

<body>
<h3> Guess A Number</br> </h3><input type="integer" id="number" size="20"/>
<input type="button" id="guess" value="GUESS" onClick="guess()"/>

</body>

＆＃13;

Answer 3

// ---使用Math.random而不是Math.Random ------

`

＆＃13;

<script>
 function guess() {
 
  var num = document.getElementById("number"); 
  //alert(num);
 var answer = Math.floor(Math.random() * 100 + 1);

 if(num == answer)
     alert("Your guess is correct! The number is" + answer);

 else if(num != answer) 
     alert("Your guess is incorrect! The number is" + answer); 

     }

</script>

＆＃13;

<body>
<h3> Guess A Number</br> </h3><input type="integer" id="number" size="20"/>
<input type="button" id="guess" value="GUESS" onClick="guess()"/>
</body>

＆＃13;

javascript输出不显示

3 个答案: