Home
JS
JS
Tryit: JAVASCRIPT
运行 ❯
×
Change Orientation
Change Theme, Dark/Light
<!DOCTYPE html> <html> <body> <p>y = 5，计算 x = ++y，并显示 y 和 x：</p> <button onclick="myFunction()">试一试</button> <p><strong>注意：</strong>变量 y 和 x 都会受到影响。</p> <p id="demo1"></p> <p id="demo2"></p> <script> function myFunction() { var y = 5; var x = ++y; document.getElementById("demo1").innerHTML = y; document.getElementById("demo2").innerHTML = x; } </script> </body> </html>