html运行实例（jsck_foreach_2）-搜寻教程库

代码示例：（标识：jsck_foreach_2）

<!DOCTYPE html>
<html>
<body>

<h1>JavaScript 数组</h1>

<p>计算数组中值的总和：</p>

<p id="demo"></p>

<script>
let sum = 0;
const numbers = [65, 44, 12, 4];
numbers.forEach(myFunction);

document.getElementById("demo").innerHTML = sum;

function myFunction(item) {
  sum += item;
}
</script>

</body>
</html>