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Today, I would like to share with you what the three rounding functions in Javascript are and how to use the relevant knowledge points, detailed content, clear logic, I believe that most people still know too much about this knowledge, so share this article for your reference, I hope you can get something after reading this article, let's take a look at it.

Here are several ways to round decimal values to integers: Math.ceil (), Math.floor (), and Math.round (). These three methods follow the following rounding rules, respectively:

◎ Math.ceil () performs upward rounding, that is, it always rounds the value up to the nearest integer

◎ Math.floor () performs rounding down, that is, it always rounds the value down to the nearest integer

◎ Math.round () performs standard rounding, that is, it always rounds the number to the nearest integer (this is also the rounding rule we learned in math class).

The following is an example of using these methods:

Alert (Math.ceil); / / 26

Alert (Math.ceil 25.5) / / 26

Alert (Math.ceil (25.1); / / 26

Alert (Math.round); / / 26

Alert (Math.round 25.5) / / 26

Alert (Math.round (25.1); / / 25

Alert (Math.floor); / / 25

Alert (Math.floor); / / 25

Alert (Math.floor (25.1); / / 25

For all values between 25 and 26 (excluding 26), Math.ceil () always returns 26 because it performs rounding up. The Math.round () method returns 26 only if the value is greater than or equal to 25.5; otherwise, it returns 25. Finally, Math.floor () returns 25 for all values between 25 and 26, excluding 26.

That's all of the article "what are the three rounding functions in Javascript and how to use them?" Thank you for reading! I believe you will gain a lot after reading this article. The editor will update different knowledge for you every day. If you want to learn more knowledge, please pay attention to the industry information channel.

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