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<!DOCTYPE html> <html> <body> <h1>JavaScript 数字</h1> <p>Infinity （或 -Infinity）是 JavaScript 在计算数时超出最大可能数范围时返回的值：</p> <p id="demo"></p> <script> var myNumber = 2; var txt = ""; while (myNumber != Infinity) { myNumber = myNumber * myNumber; txt = txt + myNumber + "<br>"; } document.getElementById("demo").innerHTML = txt; </script> </body> </html>