<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
</head>
<body>
<script>
var str = "nice to meet u";
//for (var i = 0; i < str.length; i++) {
for (var i = 0, len = str.length; i < len; i++) {
console.log("当前的字符 = " + str.charAt(i));
if (str.charAt(i) == "e") {
console.log("ok", i);
break;
}
}
/* 一次性声明两个变量 */
var a = 1;
var b = 2;
var c = 3;
console.log(a, b, c);
var a1 = 10,
a2 = 20,
a3 = 30;
</script>
</body>
</html>