点击运行
<!DOCTYPE html> <html> <body> <h1>JavaScript 数字</h1> <p>浮点的算数并不总是 100% 精准：</p> <p id="demo"></p> <script> var x = 0.2 + 0.1; document.getElementById("demo").innerHTML = "0.2 + 0.1 = " + x; </script> </body> </html>
运行结果
