01_types.js

console.log("Hello everyone!");

let count = 1;

console.log(count)

count = count + 1;

console.log(count);

const firstName = "Arthur";

// console.log(firstName.length);
// console.log(firstName[1]);
// console.log(firstName.substring(2));

// firstName = "Paul" // => Error

console.log(`My name is ${firstName}, counter is ${count}`);

array.js

const fruits = ["Banana"];

// CRUD

fruits.push("Apple");

fruits[0];

fruits[0] = "Peach";

fruits.splice(0,      1)
//            index   how many

const beatles = ["paul", "john", "ringo", "george"]


beatles.forEach((beatle) => {
  console.log(beatle.toUpperCase());
});

capitalize.js

const capitalize = (word) => {
  const firstLetter = word[0].toUpperCase();
  console.log(firstLetter, "This is my message")
  const restOfTheWord = word.substring(1).toLowerCase();

  return firstLetter + restOfTheWord;
}

console.log(capitalize("aRtHuR"));

conditionals.js

let age = 14

if (age >= 18) {
  console.log("You can vote");
} else {
  console.log("You can't vote");
}

if (age === 14) {
  console.log("You are 14");
} else if (age === 15) {
  console.log("You are 15");
} else {
  console.log("You're not 14 or 15");
}

functions.js

// OLD WAY

// function square(x) {
//   return x * x;
// }

// NEW WAY (ES6)

const square = (x) => {
  return x * x;
}

// const square = (x) => x * x;

console.log(square(4));

objects.js

const student = {
  firstName: "Boris",
  lastName: "Paillard"
};

console.log(typeof(student));

console.log(student["firstName"]);

student.jobTitle = "CEO";
student.firstName = "Arthur";

console.log(student);