How to remove the last two decimal places from javascript

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Methods: 1, use "numeric string object .substring (0, numeric string object .indexOf (". ") + 3)" statement; 2, use "Math.round (numeric object * 100) / 100" statement; 3, use "numeric object .tofixed (2)" statement.

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

How does javascript remove the last two decimal places? What should I do if I take 22.123456 into 22.12?

1. Intercept via substring

Function getnum () {var num = 22.123456 X var s=num.toString (); var result = s.substring (0mens.indexOf (".") + 3); alert (result);} getnum ()

2. Regular expression

Function getnum () {var num = 22.123456 aNew str=num.toString (); var aNew;var re = / ([0-9] +\. [0-9] {2}) [0-9] * /; aNew = str.replace (re, "$1"); alert (aNew);} getnum ()

3. Data type retention

Function getnum () {var num=22.123456;alert (Math.round (num*100) / 100);} getnum ()

4. ToFixed method

Var num=22.123456;alert (num.toFixed (2)); these are all the contents of the article "how to remove the last two decimal places in javascript". Thank you for reading! I believe we all have a certain understanding, hope to share the content to help you, if you want to learn more knowledge, welcome to follow the industry information channel!