Numeric Separators in JavaScript

Numeric separators enable us to make our numeric literals more readable by creating a visual separation between groups of digits. It is so useful especially working with large numbers. As you can see it's very hard to read.

const quantity = 100000000000;

Let's apply numeric separators to  quantity variable

const quantity = 100_000_000_000;

However, there are some limitations for numeric separators.

It cannot be used at the beginning and end of the number

const quantity =  1000_;

// its a valid variable name actually.

const quantity =  _1000;

Consecutive underscore is not allowed and  you can only put underscores between two digits.

const quantity =  10000__00;

const pi = 3_.141

const pi = 3._141

To check about browser support of numeric separators.