suhailgupta03

function sum(a, b) {
    let sum = a + b;
    return sum;
    // role of return is to "return" the 
    // value of sum to the caller
}

function isUserLoggedIn() {
    let user = {

suhailgupta03

function foobar(){
    console.log("Inside foobar");
} // helper function of printOpeningMessage

function printOpeningMessage() {
    foobar();
    console.log("Good evening! Welcome to the restaurant.")
} // helper function of sum

function sum(a, b) {

suhailgupta03

// the reason we have functions is to avoid 
// repeating code
function sum(arg1, arg2) {
    var number1 = arg1;
    var number2 = arg2;

    var sumOfNumbers = number1 + number2;
    console.log(sumOfNumbers);
}

suhailgupta03

function SOME_NAME() {
    var number1 = 100;
    var number2 = 200;

    var sumOfNumbers = number1 + number2;
    console.log(sumOfNumbers);
}

SOME_NAME();
// In the above statement, we are calling the function SOME_NAME() 

suhailgupta03

let student = {
    name: 'manoj',
    age: 20,
    course: 'cse',
    college: 'svec',
    parentNameList: ['girish', 'samita'],
};

var convertedToString = JSON.stringify(student);
// JSON is a string representation of an object

suhailgupta03

var manish = {
    name: 'Manish',
    age: 25,
    city: 'Bangalore',
    employee: true,
    id: 1,
    skills: ['HTML', 'CSS', 'JS'],
    salary: 100,
}

suhailgupta03

var students = [
    "Sudarshan", // 0th index
    "Anish", // 1st index
    "Chinmay", // 2nd index
    "Rahul", // 3rd index
    "Tushar",
    "Syed",
    "Sudarshan",
    "Subhrojoti"
];

suhailgupta03

let arr = [1, 2, 3, 4, 5];
let start = 0;
let end = arr.length - 1;

while (start < end) {
  let temp = arr[start];
  arr[start] = arr[end];
  arr[end] = temp;

  start++;

suhailgupta03

var array1 = [1, 2, 3, 4, 5];
var array2 = [6, 7, 8, 9, 10];

// array1[0] + array2[0]
// array1[1] + array2[1]

for(var i = 0;i < array1.length; i++) {
    console.log(array1[i] + array2[i]);
}

suhailgupta03

var list = [
    [1, 2, 3, 4], // 0th index
    [100, 101, 102, 199], // 1st index
    [201, 202, 203, 299], // 2nd index
]; // multi-dimensional array

// also called a matrix
// above is a 3x4 matrix

var array1 = list[0];