Data Type

JavaScript memiliki beberapa tipe data:

Primitive Types


// String
let name = "John";
 
// Number
let age = 25;
let price = 99.99;
 
// Boolean
let isActive = true;
 
// Null
let empty = null;
 
// Undefined
let notDefined;
 
// Symbol
let id = Symbol("id");

Complex Types


// Object
let person = {
  name: "John",
  age: 25
};
 
// Array
let numbers = [1, 2, 3, 4, 5];

Type Checking


typeof "John"     // "string"
typeof 25         // "number"
typeof true       // "boolean"
typeof {}         // "object"
typeof []         // "object"
typeof null       // "object"
typeof undefined  // "undefined"

Type Conversion


// String to Number
let num = Number("123");
 
// Number to String
let str = String(123);
 
// Boolean Conversion
let bool = Boolean(1); // true