​x
 
<!DOCTYPE html>
<html>
<body>
​
<h1>JavaScript Math.floor()</h1>
​
<p>Math.floor(x) 返回 x 被下舍入为最接近整数的值：</p>
​
<p id="demo"></p>
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<script>
document.getElementById("demo").innerHTML = Math.floor(4.7);
</script>
​
</body>
</html>
​