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This article is about how javascript implements division and retains two decimal places. The editor thinks it is very practical, so share it with you as a reference and follow the editor to have a look.

Implementation: 1, use the "/" operator for division, syntax "numeric 1 / numeric 2"; 2, use the "result of division operation .tofixed (2)" or "Math.floor (result of division operation * 100) / 100" statement to retain two decimal places.

The operating environment of this tutorial: windows7 system, javascript1.8.5 version, Dell G3 computer.

Javascript implements division to retain two decimal places

It can be divided into two parts:

Division of two numbers: division can be performed using the "/" operator

Keep two decimal places

In general, there are three ways to retain two decimal places:

1. Directly use the method toFixed (n) that comes with the numeric type, where the parameter is the number of digits to be reserved, and the result of this conversion is the character type.

Var Apocalypse 10 positionvar baccalaure3 var canals: + c.toFixed (2)

2, combined with Math.floor (), use the method of multiplication and division, for example, to keep two decimal places, Math.floor (clocked 100) / 100. if you want to keep three decimal places, it is Math.floor (clocked 1000) / 1000.

Var console.log ("keep two decimal places:" + Math.floor / 1000); console.log ("keep three decimal places:" + Math.floor (clocked 1000) / 1000)

This method of multiplication and division is the most common method.

3. Use regular expressions to intercept. There is a need to test the skills of the rules.

Var ("result of division by two numbers:" + c); console.log ("keep two decimal places:" + c.toString (). Match (new RegExp (/ ^\ d + (?:\.\ d {0jin2})? /)

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