HYF JS-1 Session 2 - recap from last time

gistfile1.txt

// Single line comment 1 + 1

/*
  This is a multiline
  comment 
 */

 // Data types

 /*
  Number - (Integer)
  Boolean (true/false)
  String "some text"
  Array
  Objects
 */


let string1 = "First string";
let string2 = "Second string";
let string3 = "third string";

// let variable = "Hello " + 
//               string1 + 
//               " " + 
//               string2 +
//               " " +
//               "how are you doing" +
//               " " +
//               string3;

//let variable = "Hello" + " " + string1;

//let variable = `${string1} ${string2} how are you doing ${string3}`;


let name = "Zaki";
let gender = "Mr."
let weather = "-5";
let variableEnglish = `Hello ${gender} ${name} how are you doing today. It's ${weather} degrees outside.`;
let variableDanish = `Hej ${gender} ${name} hvordan går det idag. Det er ${weather} grader udenfor.`;

// console.log(variableEnglish);
// console.log(variableDanish);


/* 
  Variables:
    Var
    Let
    Constant
*/

let hungry = false;

// Two hours later

// hungry = true;

// hungry = false;

// console.log(`Is Zaki hungry? ${hungry}`);

// Arrays have specific order!

// let pizzaIngredients = ["cheese", "salami", "tomatoes"];

// console.log(pizzaIngredients);
// console.log(pizzaIngredients[1]);

// Objects cannot be guaranteed to have specific order.

let pizzaObject = { firstIngredient: "cheese", secondIngredient: "salami" }

console.log(pizzaObject);

// Operators

// Assignment
let text = "some text" // We assign from right to left

// Comparison
text === "some other text" // "Is 'some other text' equal to 'some text'?". Answer: false
text !== "some other text" // "Is 'some other text' NOT equal to 'some text'?". Answer: true

let number = 3;
number > 2; // "Is number greater than 2. Answer: true
number < 2; // "Is number less than 2. Answer: false

// Concatenation
"some string" + "some other string";

// Math
1 + 2 // 3
1 / 3 // .333333
2 * 3 // 6
3 + number // 6

// Modulus - returns the remainder
6 / 3 // 2
6 % 3 // 0
7 % 3 // 1

console.log();