<!DOCTYPE html><html><head><title>01_define.html</title><metahttp-equiv="keywords"content="keyword1,keyword2,keyword3"><metahttp-equiv="description"content="this is my page"><metahttp-equiv="content-type"content="text/html; charset=UTF-8"><!--<link rel="stylesheet" type="text/css" href="./styles.css">--><scripttype="text/javascript">
console.log('函数的属性length,指的是该函数所期望传递进来的参数个数');
functionf1(){
}
functionf2(num1,num2){
}
functionf3(num){
}
//length是函数的属性,不是内部属性,所以通过函数名.属性来调用
console.log(f1.length);
console.log(f2.length);
console.log(f3.length);
</script></head><body>
This is my HTML page. <br></body></html>