CodHeK

//how we can use var
if(true) {
  var t = 9;
}
console.log(t) //prints 9

//how we use let
let t1 = 9;
if(true) {
  let t1 = 10;

CodHeK

if(true) {
  v = 9;
}
var v;
console.log(v) //prints 9

if(true) {
  v = 9;
}
let v;

CodHeK

const nums = [10, 20, 30]

nums.push(40)

console.log(nums) //prints [10, 20, 30, 40]

const obj = {
  age: 27,
}
obj.age = 30

CodHeK

//tradional way
function fn(a, b) {
   return a + b;
}

//using fat arrow style

var fn = (a, b) => a + b;

var fn = (a, b) => {

CodHeK

let name = "Gagan"
let age = 20

let obj = {
  name, //shorthand for name: name,
  age,
}

console.log(obj.name) //prints "Gagan"
console.log(obj.age) //prints 20

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let nums = [1, 2, 3]

let [a, b] = nums

console.log(a) //prints 1
console.log(b) //prints 2

let nums = [1, 2, 3]

let [a, ,c] = nums

CodHeK

//In arrays

let nums = [1, 2, 3, 4, 5]

let [a, ...b] = nums

console.log(a) //prints 1
console.log(b) //prints [2, 3, 4, 5]

let nums = [1, 2, 3, 4, 5]

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let nums = [1, 2, 3, 4, 5]

console.log(Math.max(...nums)) //prints 5

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let nums = [1, 2, 3, 4, 5]

for(let num of nums) {
  console.log(num)
}

//prints 1 2 3 4 5

CodHeK

let ss = "hey
this is not correct"; //error

let ss = `hey
i can write like this!`

//prints
//"hey
//i can write like this!"