robertcoopercode

const greeting = (person: string) => {
    console.log('Good day ' + person);
};

greeting('Daniel');

robertcoopercode

var greeting = function (person) {
    console.log('Good day ' + person);
};
greeting('Daniel');

robertcoopercode

let isAwesome: boolean = true;

robertcoopercode

let name: string = 'Chris';
let breed: string = 'Border Collie';

robertcoopercode

let punchline: string = 'Because it was free-range.';
let joke: string = `
	Q: Why did the chiken cross the road?
	A: ${punchline}
`;

robertcoopercode

let decimalNumber: number = 42;
let binaryNumber: number = 0b101010; // => 42
let octalNumber: number = 0o52; // => 42
let hexadecimalNumber: number = 0x2a; // => 42

robertcoopercode

let myPetFamily: string[] = ['rocket', 'fluffly', 'harry'];

robertcoopercode

let myPetFamily: Array<string> = ['rocket', 'fluffly', 'harry'];

robertcoopercode

let myFavoriteTuple: [string, number, boolean];

myFavoriteTuple = ['chair', 20, true]; // ✅
myFavoriteTuple = [5, 20, true]; // ❌ - The first element should be a string, not a number

robertcoopercode

enum Sizes {
    Small,
    Medium,
    Large,
}

Sizes.Small; // => 0
Sizes.Medium; // => 1
Sizes.Large; // => 2