JavaScript Math.floor method (round down the value)_Basic knowledge

JavaScript Math.floor method
The Math.floor method is used to round down a value, that is, to obtain the largest integer less than or equal to the value. The syntax is as follows:

Math.floor(x)
Parameter description:

Tip: This method is the opposite of the Math.ceil method.

Math.floor method instance

<script language="JavaScript">
document.write( Math.floor(0.35) + "<br />" );
document.write( Math.floor(10) + "<br />" );
document.write( Math.floor(-10) + "<br />" );
document.write( Math.floor(-10.1) );
</script>

Run this example, output:

0
10
-10
-11

Math.floor may be inaccurate

If the parameter x is an expression involving floating point numbers, due to the inherent principles of the computer, the result of applying the Math.floor method to the expression may be inaccurate (unconventional). For details, please refer to "Math.ceil Relevant description in the article "Method ".