<!DOCTYPE?html>
<html>
<head>
<title></title>
</head>
<body>
<script?type="text/javascript">
var?num1="100";
var?num2="200";
var?num3="300";
document.write("num1='100'?num2='200'?num3='300'"?);
var?result=Number(num1)+Number(num2);
document.write("<br>數值的運算結果為:",result);
var?st=String(num1);
result=st+200;
document.write("<br>字符串與數字的運算結果為:",result);
var?sr=Boolean(num2);
result=sr*num1;
document.write("<br>字符串與布爾值的運算結果為:",result);
</script>
</body>
</html>
關于javascript計算的問題
掌門飛哥
2017-03-05 11:54:16
