点击运行
<!DOCTYPE html> <html> <body> <h2>JavaScript 数值</h2> <p>超大或超小的数值可以用科学计数法来写：</p> <p id="demo"></p> <script> var y = 123e5; var z = 123e-5; document.getElementById("demo").innerHTML = y + "<br>" + z; </script> </body> </html>
运行结果
