<!DOCTYPE html>
<html>
<head>
<title>for循环</title>
</head>
<body>
<script type="text/javascript">
// for(初始化条件；结束条件；递增条件){
// run this code
// }
var i;
for(i = 1;i <= 10000;i++){
console.log(i);
sum = sum + i;
}
console.log(sum);
var shopping = ['香蕉','苹果','牛奶'];
var j;
for(j = 0;j < shopping.length;j++){
// console.log(shopping[j]);
// document.write(shopping[j]);
// html标签和javascript组合
var htmlStr = '<h1>'+shopping[j]+'</h1>';
console.log(htmlStr);
document.write(htmlStr);
}
</script>
</body>
</html>