html运行实例（jsck_reduceright

代码示例：（标识：jsck_reduceright_2）

<!DOCTYPE html>
<html>
<body>

<h1>JavaScript 数组</h1>

<p>计算从右到左减去数组中的数字的结果。</p>

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

<script>
const numbers = [2, 45, 30, 100];
document.getElementById("demo").innerHTML = numbers.reduceRight(getSum);

function getSum(total, num) {
  return total - num;
}
</script>

</body>
</html>