Orientation and javascript overview

<!-- Javascript primer:
    Declaring variable
    Data Type:
        primitive
            string: 'hi', "hello"
            number: 10, 10.34 , -2 , -2.345
            boolean: true, false
            undefined : undefined
            null: null
            Symbol- Symbol('address') !== Symbol('address')
            BigInt
        complex data type
            object - {}
            array- []
            function

Things to get ready
Loop:
while loop
For Loop
For of Loop
For in Loop

Checking data on object

understanding function

conditionals and ternary -->


//var, let, const
// var firstName = 'samim' // should avoid this
// let lastName = 'Hasan'
// const email = 'samimfazlu@gmail.com'

// lastName = 'fazlu'
// console.log(lastName)

// const fName = 'samim'
// console.log(typeof fName)

// console.log(Symbol('address') === Symbol('address'))

// const obj = {
//   name: 'samim',
//   age: 30,
// }

// console.log(obj.name)
// obj.name = 'Khalil'
// console.log(obj['name'])
// obj.profession = 'software Developer'
// console.log(obj)

// const arr = ['samim', 30, 'programmer']
//             // 0          1    2
// console.log(arr[0])
// console.log(arr[arr.length - 1])

//loop
//for loop
//while
//do while(X)

// for(let i = 0; i < 10; i++){
//     console.log(i)
// }

// let i = 0
// while (i < 10) {
//   console.log(i)
//   i++
// }

//looping array
// const arr = ['samim', 30, 'programmer']

// for(let i = 0; i < arr.length; i++){
//     console.log(arr[i])
//     console.log(i)
// }

//for of loop
// for(let elm of arr ){
//     console.log(elm)
// }

//object looping
// const obj = {
//   name: 'samim',
//   age: 30,
// }

// console.log('name' in obj)
//for in loop

// for(let key in obj){
//     console.log(obj[key])
//     console.log(key)
// }

//conditional
// const age = 14
// if (age > 18) {
//   console.log('you can vote')
// } else {
//   console.log('you cant vote')
// }

// //ternary operator
// const result = age > 18 ? 'you can vote': 'you cant vote'
// console.log(result)




// 50, 60
// 50 + 60 = 110
// 110 / 2 = 55


// function avg(num1, num2){
//     const total = num1 + num2
//     const result = total /2
//     return result
// }

// console.log(avg(50, 60))
// console.log(avg(110, 120))


//nested loop
// for(let i = 0; i < 3; i++){
//     for(let j = 0; j < 3; j++){
//         console.log(i, j)
//     }
//     console.log(i)
// }