1.
实例
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>JS循环，对象与函数</title>
<script>
// while 循环输出
var user1 = [1,2,3,4,5,6,7,8,9];
var i = 0; //循环变量
// 循坏开始
while (i<user1.length) {
// 数组元素%2，余数不等于0，就是奇数
if (user1[i] % 2 !==0) {
document.write(user1[i]);
}
i++; // 更新条件 +1
}
document.write( "<br>");
// 对象字面量花括号包裹起来非法的名称用引号包裹起来
var user2 ={
name:'一加7pro',
battery:'4000mAh' ,
cpu:' 骁龙855',
screen:'6.67',
price:'3999'
};
document.write('名字:'+user2.name+ "<br>");
document.write('电池容量:'+user2.battery+ "<br>");
document.write('处理器:'+user2.cpu+ "<br>");
document.write('屏幕尺寸:'+user2.screen+ "<br>");
document.write('价格:'+user2.price+ "<br>");
// 函数表达式求三个数值之和
var user3 = function(a,b,c) {
var w=a+b+c;
document.write('a+b+c='+w);
}; // 匿名函数花括号末尾要加分号
user3(9,99,999);
</script>
</head>
<body>
</body>
</html>运行实例 »
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