let myName = 'Sifen';   // String
let age = 20;           // Number
let isLearningJS = true; // Boolean

console.log(myName, age, isLearningJS);

let score = 10;
score = 15;  // This works!

const birthYear = 2004;
birthYear = 2005;  // This gives an error!

let age = 18;
console.log(age == '18');   // true (only checks value)
console.log(age === '18');  // false (checks both value and type)

let isAdult = true;
let hasID = false;
console.log(isAdult && hasID);  // false (because one is false)
console.log(isAdult || hasID);  // true (because one is true)

let age = 18;

if (age >= 18) {
  console.log("You're an adult! 🎉");
} else {
  console.log("You're still a minor! 🧒");
}

let day = "Monday";

switch(day) {
  case "Monday":
    console.log("Start of the week grind! 💪");
    break;
  case "Friday":
    console.log("Weekend’s almost here! 🎉");
    break;
  default:
    console.log("Another day, another code! 🤓");
}