点击运行
<!DOCTYPE html> <html> <body> <h1>JavaScript 数字</h1> <p>整数（不使用指数或科学计数法）会被精确到 15 位：</p> <p id="demo"></p> <script> var x = 999999999999999; var y = 9999999999999999; document.getElementById("demo").innerHTML = x + "<br>" + y; </script> </body> </html>
运行结果
