QuocCao-dev

function greeting(name){
   if(name === undefined){
       name = 'user'
   }
   return 'Hello '+ name;
}
console.log(greeting())

QuocCao-dev

var name = "Francis";
var lastname = "Jones"
var age = 23;
var obj
function createObject(name,lastname,age){
   obj = {
       name:name,
       lastname:lastname,
       age:age,
   }

QuocCao-dev

const subLength = (string, character) => {
  let arr = []; // lưu index của 2 phần tử sẽ gặp
  for (let i = 0; i < string.length; i++) {
    if (string[i] === character) {
      arr.push(i);
    }
  }

  if (arr.length !== 2) return 0;
  return arr[1] - arr[0] + 1;

QuocCao-dev

function kiemtra(mon1, mon2, mon3, khuVuc, doiTuong, diemChuan) {
  if (mon1 * mon1 * mon3 === 0) return "Rớt";

  let tongDiem = mon1 + mon2 + mon3;
  const diemCongThemKhuVuc = {
    A: 2,
    B: 1,
    C: 0.5,
  }[khuVuc];
  tongDiem += diemCongThemKhuVuc;

QuocCao-dev

// 9
const removeEven1 = (arr) => arr.filter((el) => el % 2 !== 0);
const removeEven2 = (arr) => arr.filter((el) => el % 2);
removeEven1([1, 2, 4, 5, 10, 6, 3]);

// 10
const capitalize = (words) =>
  words.map((el) => el.charAt(0).toUpperCase() + el.slice(1));

// 11.

QuocCao-dev

const players = [
  { jersey: 56, name: "Djounte Murray", position: "Point guard", PPG: 2.6 },
  { jersey: 98, name: "Dennis Rodman", position: "Small Forward", PPG: 10.8 },
  { jersey: 1, name: "Michael Jordan", position: "Small Forward", PPG: 345.6 },
  { jersey: 2, name: "Lebron James", position: "Shooting Guard", PPG: 26.7 },
  { jersey: 33, name: "Patrick Ewing", position: "Center", PPG: 20.2 },
];

const loopName = (value) =>
  console.log(

QuocCao-dev

let firstName = "Nguyen";
let lastName = "Nhan";
let age = "24";
let job = "software engineering";
let salary = "100";
console.log(
  `My name is ${firstName} ${lastName}, i'm ${age} years old. I work as ${job} and make ${salary}`
);

QuocCao-dev

console.log('Hello')

QuocCao-dev

console.log('Hello World)

QuocCao-dev

/**
1. Create a variable named `myAge`, and set it equal to your age as a number.
Write a comment that explains this line of code.
 */

// my current age
const myAge = 26;

// early age
let earlyYears = 2;