JavaScript 中的参数和实参。

javascriptweb developmentobject oriented programming更新于 2025/8/19 11:56:17

函数参数是函数定义中存在的变量的名称。函数实参是传递给函数并由函数接收的实际值。

以下是显示 JavaScript 中的参数和实参的代码 −

示例

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Document</title>
<style>
   body {
      font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
   }
   .result,.sample{
      font-size: 20px;
      font-weight: 500;
   }
</style>
</head>
<body>
<h1>Function parameters and arguments</h1>
<div class="sample"></div>
<div style="color: green;" class="result"></div>
<button class="btn">点击此处</button>
<h3>
Click on the above button to pass the above values as arguments to the function.
</h3>
<script>
   let sampleEle = document.querySelector('.sample');
   let resEle = document.querySelector(".result");
   let arr = [22,33,44,55];
   sampleEle.innerHTML = arr;
   function add(ARR){
      let sum = 0;
      ARR.forEach(element => {
         sum+=element;
      });
      return sum;
   }
   document.querySelector(".Btn").addEventListener("click", () => {
      resEle.innerHTML = 'After addition = ' + add(arr);
   });
</script>
</body>
</html>