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Các kiểu dữ liệu trong Javascript 🎉

#	Data Type	Desc
1	number	int or float, integers are limited by `±(2^53-1)`
2	bigint	is for integer numbers of arbitrary length.
3	string	for strings, no single character type
4	boolean	for true / false
5	null	for unknown values – a standalone type that has a single value null.
6	undefined	for unassigned values – a standalone type that has a single value undefined.
7	symbol	for unique identifiers.
8	object	`NON-Primitive` type, used for complex data structure

const age = 18;
const name = 'Easy Frontend';
const isActive = true;

const student = {
  name: 'Po',
  age: 18,
}

let powerfulVar; // count will be undefined
powerfulVar = 1;
powerfulVar = 'Hello';
powerfulVar = true;
powerfulVar = {
  name: 'crazy javascript =)))'
};

typeof operator

Tham khảo: https://javascript.info/types

typeof operator