<! DOCTYPE HTML>
<HTML>
<head>
<Meta charset = "UTF-. 8">
<title> </ title>
</ head>
<body>
<Script> // routine for, while loop is the same // here only for recording and for ... in loop var List = [l, 2,3 ];
for (I in List) {
the console.log (I, List [I]);
} var obj = {name : 'zhansan', Age: 18 is, Sex: 'NaN3' }
for (I in obj) {
the console.log (I, obj [I]);
} for ( var I = 0; I <10;i++){
console.log(i);
}
</script>
</body>
</html>