W3School TIY Editor
W3School 在线教程
改变方向
暗黑模式
运行代码
<!DOCTYPE html> <html> <body> <h1>JavaScript 数组</h1> <p>将每个元素的值乘以 10:</p> <p id="demo"></p> <script> const numbers = [65, 44, 12, 4]; numbers.forEach(myFunction) document.getElementById("demo").innerHTML = numbers; function myFunction(item, index, arr) { arr[index] = item * 10; } </script> </body> </html>