<!-- edu_14_5_9.html -->
<!doctype html>
<html lang="en">
<head>
? <meta charset="UTF-8">
<title>计算1！+2！+3！+4！+5！的和</title>
</head>
<body> ? ?
<script type="text/javascript">
document.write("计算1！+2！+3！+4！+5！的和<br/>");
for (i=1,sum=0;i<=5 ;i++ )
{
? for (j=1,cj=1;j<=i ;j++ )
? {
? ? cj=cj*j;? ? ? ? ? ? ?
? }
? document.write(i+"!="+cj+"<br/>");
? sum=sum+cj;
}
document.write("1！+2！+3！+4！+5！="+sum);
</script>
</body>
</html>
