구구단 만들기

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>