Drill 7: Summarise — Primitive types and arrays

let name: string = 'Ada'
let score: number = 42
let passed: boolean = true
let empty: null = null
let missing: undefined = undefined

const names: string[] = ['Ada', 'Grace']
const sameNames: Array<string> = ['Alan', 'Katherine']

const pair: [string, number] = ['Ada', 42]

const fixed: readonly string[] = ['Ada', 'Grace']