​x
 
<!DOCTYPE html>
<html>
<body>
​
<h2>JavaScript 数据类型</h2>
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<p>当字符串和数值相加时，JavaScript 将把数值视作字符串。</p>
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<p id="demo"></p>
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<script>
var x = "Porsche" + 911;
document.getElementById("demo").innerHTML = x;
</script>
​
</body>
</html>
​