To explain the concept of localization and number format based on their locale I am taking my previous article as reference to display the price based on different countries and their currencies. So please check my previous article How to Create Nested Grid using Angular 8 .As reference i am fetching the price and displaying with currency symbol based on their country and currency code, additionally in nested grid i am displaying all countries price format with currency symbol . In this article i am just trying to explain the concept of tolocalestring() which i am going to apply in price.So in my previous article i am just displaying price in 'en' format which is just a decimal number but what if we want to see the price according to their country . Introduction : Most of the times i have seen many users got confused how different countries used different format to display number format according to their country code.Most of the countries use "do