<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
<h2 id= "res"></h2>
<script>
var a=100;
var b= 50;
if (a==100 && b==50)
{
document.getElementById("res").innerHTML="逻辑与，表示两个条件同时满足"
}
if (a==100 || b==50)
{
document.getElementById("res").innerHTML="逻辑或，表示两个条件满足其一"
}
var c=0;
if (!c)
{
document.getElementById("res").innerHTML="逻辑非"
}
(a==100)?
(document.getElementById("res").innerHTML="真" ):
document.getElementById("res").innerHTML="假";
document.getElementById("res").innerHTML=typeof(a);
</script>
</body>
</html>
