How to round in JavaScript

Methods for rounding in JavaScript: 1. Round down through Math.floor(); 2. Round up through Math.ceil(); 3. Round up through Math.round(); 4. Rounded by parseInt().

The operating environment of this article: windows7 system, javascript version 1.8.5, Dell G3 computer.

How to round in JavaScript?

Several methods of rounding in JavaScript

Math.floor() Down Rounding

Math.floor(3.141592654) // 3

Math.ceil() Rounding up

Math.ceil(3.141592654) // 4

Math.round() Rounding

Math.round(3.141592654) // 3

parseInt() Remove the decimal point and the part after the decimal point

parseInt(3.141592654) // 3

~~ Convert data into Number type

~~3.141592654 // 3

Recommended learning: "javascript Advanced Tutorial"

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