Regular Expression Pattern With A Variable

Question

I am using regular expression to check number of digits after decimal.

This is working fine when it is used for two or three digits, for example \d{2} or \d{3}, but what if I need to pass a variable instead of 2 and 3?

How do I pass a variable to the pattern? Is it possible?

Answer 1

You can use RegExp, like;

//just an example though
var i = 2;
var pattern = new RegExp("\\d{"+i+"}$");

Answer 2

You can write a function that generates the RegEx string with the parameter you provide for the number or decimal digits you need.