//var const let

let a=5

var b=1

const c=3

console.log("original values",a,b,c)

a=6

b=2

// c=4

console.log("updated values",a,b,c)//giving error bc of c

function abcd(){

var d=3 //function scoped

if(1){

const e=4

let f=5 // braces scoped

console.log(e,f,d)

}

}

abcd()

// var add itself in window obj which is highly insecure for data privacy thats why let and const

//were introduced which if defined in script.js will not add themself in window obj

//simple function

let fun=function(){

console.log("one way of defining function")

}

fun()

function xyz(){

console.log("second way of defining function")

}

xyz()

//arrow function

let erg=()=>{

console.log("this is arrow function")

}

erg()

//object

var obj={}//blank obj

console.log(obj)

var obj1={

name:"mak",

class:2,

work:function(){

console.log("study")

}//method

}

console.log(obj1)

console.log(obj1.work)

obj1.name="kam"

console.log(obj1.name)

//obj destructuring

const {name}=obj1

console.log(name)

//arrays

//foreach

var arr=["mak","pet",2,{model:10,color:"white"},[a,b,c]]

arr.forEach((item)=>{

console.log(item)

})

//map

var arr=[1,"hash"]

const newarr=arr.map((item)=>{

return item

})

console.log(newarr)

//filter

var arr1=[1,2,3,4,5,6,7,8,9,10]

const newarr1=arr1.filter((item)=>{

if(item<=5)

return item

})

console.log(newarr1)

//find

var arr2=[3,2,4,5,2]

var newarr2=arr2.find((item)=>{

if(item==2){

return item

}

})

console.log(newarr2)

//class

//template

class person{

constructor(name,age){

this.name=name;

this.age=age;

}

details(){

console.log(this.name,"is",this.age,"years old");

}

}

let p1=new person("Jane",12)

p1.details();

//async await

async function api(){

let data= await fetch("https://dummyjson.com/test")

let output=data.json()

console.log(output)

}

api();