html运行实例（jsck_reduce_2）-搜寻教程库

代码示例：（标识：jsck_reduce_2）

<!DOCTYPE html>
<html>
<body>

<h1>JavaScript 数组</h1>

<p>计算数组中被四舍五入的数字的总和。</p>

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

<script>
const numbers = [15.5, 2.3, 1.1, 4.7];

document.getElementById("demo").innerHTML = numbers.reduce(getSum, 0);

function getSum(total, num) {
  return total + Math.round(num);
}
</script>

</body>
</html>