How to round data in JavaScript

There are several methods to implement data rounding: round method, tofixed method, parseInt method, ceil method and floor method

Rounding of values ​​in JavaScript There are the following

round() methods: a number can be rounded to the nearest integer, that is, rounding

toFixed() method: a Number can be rounded to the specified number of decimal places number.

parseInt() method: can convert decimals into integers (bit operators)

ceil() method: can round up a number

floor() Method: A number can be rounded down

The specific usage of these methods will be introduced in detail in the article

round() method

	document.write(Math.round(4.55) + "<br>");
	document.write(Math.round(-6.45));

Rendering:

##toFixed() method

var num=3.141592;
document.write(num.toFixed(2));

Rendering:

##parseInt() method

document.write(parseInt("12.333"));
	

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ceil() method and floor() method

document.write("ceil方法：")
document.write(Math.ceil("12.333") + "<br>");
document.write("floor方法：")
document.write(Math.floor("12.333"));

Rendering:

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