for문 사용예제
<HTML>
<HEAD>
<TITLE>FOR문 연습</TITLE>
<script type="text/javascript">
var i, j, k
document.write("1)<br>")
for (i = 0; i <= 4; i++)
{
for (j = 0; j <= i; j++)
{
document.write("☆")
}
document.write("<br>")
}
document.write("<br>")
document.write("2)<br>")
for (i = 4; i >= 0; i--)
{
for (j = 0; j <= i; j++)
{
document.write("☆")
}
document.write("<br>")
}
document.write("<br>")
document.write("3)<br>")
for (i = 8; i >= 0; i -= 2)
{
for (j = 0; j <= i; j++)
{
document.write("☆")
}
document.write("<br>")
}
document.write("<br>")
document.write("4)<br>")
for (i = -8; i <= 8; i += 2)
{
k = i;
if (k < 0)
{
k = -k;
}
for (j = 0; j <= k; j++)
{
document.write("☆")
}
document.write("<br>")
}
document.write("<br>")
document.write("5)<br>")
for (i = 0; i <= 4; i++)
{
for (j = 0; j <= i; j++)
{
document.write("☆")
}
document.write("<br>")
}
document.write("<br>")
</script>
</HEAD>
<BODY>
<p> </p>
</BODY>
</HTML>