循环还是很有意思的:
1) 安全数的作业:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>安全数</title>
</head>
<body>
<script type="text/javascript">
for(var i = 1;i<=60;i++)
{
if (i%7!=0 && i%10!=7)
{
document.write(i+" ");
}
}
</script>
</body>
</html>
2) 0.01毫米的纸对折30次就不得了了:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
</head>
<body>
<script type="text/javascript">
var j = 0.01;
for(var i = 1;i<=30;i++)
{
j *= 2;
}
document.write(j/1000+"米");
/*var j = 0.01;
var i = 0;
while (j<=1000) {
j *= 2;// statement
i++
}
document.write(i);*/
</script>
</body>
</html>
3) 7个数中的最大值和最小值以及对应的下标:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>哈哈哈哈哈哈</title>
</head>
<body>
<script type="text/javascript">
var arr = [10,20,35,87,2,14,7];
var max = arr[0];
var min = arr[0];
var maxIndex,minIndex;
for(var i = 0; i < 7 ; i++){
if(max < arr[i])
{
max = arr[i];
maxIndex = i;
}
if (min > arr[i])
{
min = arr[i];
minIndex = i;
}
}
document.write(max+‘ ‘+maxIndex+"<br>"+min+" "+minIndex);
</script>
</body>
</html>
时间： 2024-10-11 20:57:56