JS數值變數和字串變數

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代碼:
<script type="text/javascript">        window.alert("你好");        document.write("你好");        document.write("<hr>");        var a = "10";//所謂連結就是將左右字串串連起來        var b = 10;        var c = a+b;        document.write(c);        document.write("<hr>");        var name = "賈光聖";        var xuehao  = "1201010739";        var sex = "男";        var adress = "成都";        var str = ‘‘            str +=    ‘<table width="500" border="1" align="center">‘;            str +=    ‘    <tr>‘;            str +=    ‘    <th colspan="6" align="center">西南石油大學學生資訊表</th>‘;            str +=    ‘    </tr>‘;            str +=    ‘    <tr>‘;            str +=    ‘        <td>姓名:</td>‘;            str +=    ‘        <td>學號:</td>‘;            str +=    ‘        <td>性別:</td>‘;            str +=    ‘        <td>生源地:</td>‘;            str +=    ‘    </tr>‘;            str +=    ‘    <tr>‘;            str +=    ‘        <td>‘+name+‘</td>‘;            str +=    ‘        <td>‘+xuehao+‘</td>‘;            str +=    ‘        <td>‘+sex+‘</td>‘;            str +=    ‘        <td>‘+adress+‘</td>‘;            str +=    ‘    </tr>‘;             str +=    ‘</table>‘;        document.write(str);    </script>
運行結果:

<script type="text/javascript">        window.alert("你好");        document.write("你好");        document.write("<hr>");        var a = "10";//所謂連結就是將左右字串串連起來        var b = 10;        var c = a+b;        document.write(c);        document.write("<hr>");        var name = "賈光聖";        var xuehao  = "1201010739";        var sex = "男";        var adress = "成都";        var str = ‘‘            str +=    ‘<table width="500" border="1" align="center">‘;            str +=    ‘    <tr>‘;            str +=    ‘    <th colspan="6" align="center">西南石油大學學生資訊表</th>‘;            str +=    ‘    </tr>‘;            str +=    ‘    <tr>‘;            str +=    ‘        <td>姓名:</td>‘;            str +=    ‘        <td>學號:</td>‘;            str +=    ‘        <td>性別:</td>‘;            str +=    ‘        <td>生源地:</td>‘;            str +=    ‘    </tr>‘;            str +=    ‘    <tr>‘;            str +=    ‘        <td>‘+name+‘</td>‘;            str +=    ‘        <td>‘+xuehao+‘</td>‘;            str +=    ‘        <td>‘+sex+‘</td>‘;            str +=    ‘        <td>‘+adress+‘</td>‘;            str +=    ‘    </tr>‘;             str +=    ‘</table>‘;        document.write(str);    </script>

<script type="text/javascript">        window.alert("你好");        document.write("你好");        document.write("<hr>");        var a = "10";//所謂連結就是將左右字串串連起來        var b = 10;        var c = a+b;        document.write(c);        document.write("<hr>");        var name = "賈光聖";        var xuehao  = "1201010739";        var sex = "男";        var adress = "成都";        var str = ‘‘            str +=    ‘<table width="500" border="1" align="center">‘;            str +=    ‘    <tr>‘;            str +=    ‘    <th colspan="6" align="center">西南石油大學學生資訊表</th>‘;            str +=    ‘    </tr>‘;            str +=    ‘    <tr>‘;            str +=    ‘        <td>姓名:</td>‘;            str +=    ‘        <td>學號:</td>‘;            str +=    ‘        <td>性別:</td>‘;            str +=    ‘        <td>生源地:</td>‘;            str +=    ‘    </tr>‘;            str +=    ‘    <tr>‘;            str +=    ‘        <td>‘+name+‘</td>‘;            str +=    ‘        <td>‘+xuehao+‘</td>‘;            str +=    ‘        <td>‘+sex+‘</td>‘;            str +=    ‘        <td>‘+adress+‘</td>‘;            str +=    ‘    </tr>‘;             str +=    ‘</table>‘;        document.write(str);    </script>

 

JS數值變數和字串變數

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