JS Data type of
mention JS Data type of , This should be JS The most basic knowledge of , But many beginners may not be clear JS What are the data types , Or it's not comprehensive enough , Some people say there is 6 Type of data , Some people say there is 7 Kind of . Today I want to summarize JS Data type of , I hope it can be helpful for beginners .
Question 1 ：
JS Which types of data can be divided into ？
answer ：
JS There are two types of data ：1. Basic data type ,2. Reference data type
Question two ：
JS How many data types are there , What kind of ？
answer ：
stay ES5 When , The data types are 6 Kind of （ This is also the initial cognition of beginners ）：
Basic data type ：String、Number、Boolean、Undefined、Null（5 Kind of ）
Reference data type ：Object
But according to the latest standards
JS There are a total of 8 Kind of , They are
Basic number data type ：String、Number、Boolean、Undefined、Null、Symbol（ES6 newly added ）、BigInt（ES2020 newly added ）
Reference data type ：Object
among ,
Symbol yes ES6 A new data type , To put it simply ： It is used to represent unique values
and bigint（ Large integer ） yes ES2020 A new data type introduced , This is a ECMAScript The eighth data type .BigInt It's only used to represent integers , There is no limit to the number of digits , An integer of any number of digits can be expressed exactly .
