<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>