​x
 
<!DOCTYPE html>
<html>
<body>
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<h1>JavaScript 数字</h1>
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<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>
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<p id="demo"></p>
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<script>
var myNumber = 2; 
var txt = "";
while (myNumber != Infinity) {
   myNumber = myNumber * myNumber;
   txt = txt + myNumber + "<br>";
}
document.getElementById("demo").innerHTML = txt;
</script>
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</body>
</html>
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