세로줄 구구단
<script language = "javascript" type="text/javascript">
//2~9단
for(var i=2; i<=9; i++){
for(var j=1; j<=9; j++){
document.write( i +"*"+ j + "=" + i*j + "<br/>");
}
document.write("<hr />");
}
</script>
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가로줄 구구단
<script language="javascript" type="text/javascript">
for(var i=1; i<=9;i++){
for(var j=2; j<=9; j++){
document.write(j + "*" + i + "=" + j*i +"\t");
}
document.write("<br />");
}
</script>
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심화 구구단
<h3 style="text-align:center">GUGUDAN</h3>
<script language = "javascript" type="text/javascript">
document.write("<table border='1' width='50%'align='center'>");
document.write("<tr>");
for(var k=2; k<=9; k++){
document.write("<td bgcolor='silver' align='center'>" + k + "dan</td>");
}
document.write("</tr>");
for(var i= 1; i<=9; i++){
document.write("<tr>");
for(var j=2; j<=9; j++){
document.write("<td>");
document.write(j + "*" + i + "=" + j*i +"\t");
document.write("</td>");
}
document.write("</tr>");
}
document.write("</table>")
</script>