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Copy pathdatatypes_summary.js
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66 lines (39 loc) · 1.23 KB
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// Primitive datatype
// they are call by values
// 7 types : String, Number, Boolearn, null, undefined, Symbol, BigInt
const score = 100
const scoreValue = 100.3
const isLoggedIn = false
const outsideTemp = null // typeof is object
let userEmail ;
const id = Symbol('123')
const anotherId = Symbol('123')
// console.log(id === anotherId)
const bigNumber = 2312343423423434553n //BigInt
// Reference (Non primitive)
// Array, Objects, Functions
const heros = ["shaktiman", "naagraj"]; // Arrays
let myObj = {
name: "sandeep",
age: 26,
}
const myFunction = function() {
console.log("Hello World");
}
// console.log(typeof outsideTemp);
// ******************************************
// Memorys
// Stack (Primitive) (we get copy in stack), Heap (Non primitive) (we get reference in heap)
let myYoutubename = "sandeepdhanger"
let anothername = myYoutubename
anothername = "chaiaurcode"
console.log(myYoutubename);
console.log(anothername);
let userOne = {
upi: "user@ybl",
}
let userTwo = userOne
console.log(userOne.email);
console.log(userTwo.email);