Datatypes are nothing but different forms of data ie: strings, numbers, boolean etc
const age = 18; // number
const name = "kaarthik" // string
const boy = true; // Boolean
JavaScript's String type is used to represent textual data & string is enclosed between ' ' or " " quotes.
const name = "kaarthik" // string
Boolean represents a logical entity and can have two values: true and false.
const boy = true; // Boolean
when we declare a variable and doesn't assign any values it means that the variable is undefined.
let age;
console.log(age);
console.log(typeOf age); // Undefined
It means that particular variable known to exsist but doesn't have any value.
let age = null;
console.log(typeOf age); // Null
we can view the type of a particular data using typeof method
console.log(typeOf age); // Number
console.log(typeOf string); // String