How to remove decimal part in javascript

Removal method: 1. Use parseInt(), the syntax "parseInt(value)"; 2. Use ceil(), the syntax "Math.ceil(value)"; 3. Use floor(), the syntax " Math.floor(value)"; 4. Use round(), the syntax is "Math.round(value)".

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

Javascript method to remove decimal part

1. Use parseInt() function to round

// 丢弃小数部分,保留整数部分
parseInt(3.141592654) // 3

2. Use the ceil() function to round up

// 向上取整,有小数就整数部分加1
Math.ceil(3.141592654) // 4

3. Use the floor() function to round down

// 向下取整,丢弃小数部分
Math.floor(3.141592654) // 3

4. Use the round() function to round

// 四舍五入
Math.round(3.141592654) // 3

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