review.js

'hello world'
"hello world"

123
1.23
-123

false
true

// ==============

let a = 'hello world';
a = 'hello new world';

// ==============

const name = 'Alex';
const templateString = `hello ${name}`;

// ==============

// IF condition THEN do something

// if (condition) {
//     do something    
// }

// const condition = true;
// if (condition) {
//     console.log('condition is true');
// } else {
//     console.log('condition is false');
// }

// ==============

// Falsy values
// * ''
// * 0
// * false
// * undefined

// Truthy values
// * 'asdf'
// * 1, -2, 1.1
// * true

const value = 0;

if (value) {
    console.log('Value is truthy!');
}

// ==============

const e = 'asdf' === 'asdf';
console.log(e);

// ==============

function myFunction() {
    console.log('Hello world');
    console.log('Hello new world');
}

function add(number1, number2) {
    const sum = number1 + number2;
    return sum;
}

console.log(add(10, 20));