'use strict';

console.log(100 + 10); // 110
console.log(100 - 10); // 90
console.log(100 * 10); // 1000
console.log(100 / 10); // 10
console.log(100 % 10); // 0

console.log("hello world"); // 'hello world'
console.log("9"); // '9'
console.log("9" + 1); // '91'

let number = 100;
let number2 = 10;

console.log(number + number2); // 110
console.log(number - number2); // 90
console.log(number * number2); // 1000
console.log(number / number2); // 10
console.log(number % number2); // 0

let string = "hello";

console.log(string); // "hello"

function add (one, two) {
  return one + two;
}

let ten = add(5, 5); // 10

console.log(ten); // 10

function capitalize (string) {
  console.log(string.toUpperCase());
}

capitalize(string); //HELLO

let tru = true;
let fal = false;

console.log(tru);
console.log(fal);

// === asks if the two things are "the same"

if (tru === true) { // true is equal / "the same" to true so it prints 'tru is true'
  console.log("tru is true"); // 'true is tru'
}

if (fal === true) { // nothing occurs because fal isn't true
  console.log("fal is true"); // nothing
}

function isOdd (number) {
  return (number % 2 === 1);
}

let question = isOdd(2);

console.log(question);

if (isOdd(7)) {
  console.log('7 is an odd number');
}