<!DOCTYPE html>
<html>
<body>
<h1>JavaScript 字符串运算符</h1>
<h2>+ 运算符</h2>
<p>+ 运算符连接（添加）字符串。</p>
<p id="demo"></p>
<script>
let text1 = "Bill";
let text2 = "Gates";
let text3 = text1 + " " + text2;
document.getElementById("demo").innerHTML = text3;
</script>
</body>
</html>