JavaScript Math.round() method_javascript tips

Definition and usage of Math.round() method:

The Math.round() method will round the parameters.

Click to see more related Math object methods and properties.

Grammar structure:

Math.round(x)

Parameter list:

参数	描述
x	必需。必须是数值类型。

Example code:

Example 1:

Copy code The code is as follows:

console.log(Math.round(-2.1));

Output result: -2.

Example 2:

Copy code The code is as follows:

console.log(Math.round(-2.9));

Output result: -3.

Example 3:

Copy code The code is as follows:

console.log(Math.round(2.9));

Output result: 3.

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