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巢狀迴圈

巢狀迴圈. 如同 VB 一樣，在學會了單層迴圈後，接下來就要練習巢狀迴圈。 雖說 『 巢狀 』 ，其實大部份的程式也不過雙層而已，三層以上很少用到。. 例題. 設計一程式，輸入一整數，求小於等於該整數的所有質數。 要求：每 5 個質數之後要換一列。 畫面例： 200 以內的質數. 例題 : 九九乘法表. 要求：每 9 個數之後要換一列。 畫面例：表格. 九九乘法表 程式碼. <script language="javascript"> var i, j; for(i=1;i<=9;i++) { document.write("<tr>");

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巢狀迴圈

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  1. 巢狀迴圈 如同 VB 一樣，在學會了單層迴圈後，接下來就要練習巢狀迴圈。 雖說『巢狀』，其實大部份的程式也不過雙層而已，三層以上很少用到。 巢狀迴圈

  2. 例題 • 設計一程式，輸入一整數，求小於等於該整數的所有質數。 • 要求：每 5 個質數之後要換一列。 • 畫面例：200 以內的質數 巢狀迴圈

  3. 巢狀迴圈

  4. 例題:九九乘法表 • 要求：每 9 個數之後要換一列。 • 畫面例：表格 巢狀迴圈

  5. 九九乘法表 程式碼 <script language="javascript"> var i, j; for(i=1;i<=9;i++){ document.write("<tr>"); for(j=1;j<=9;j++) { document.write("<td>"); document.write(i + "*"+ j + "="+ i * j); document.write("</td>"); } document.write("</tr>"); } </script> 巢狀迴圈

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