[TS] 기본 자료형

// primary type
const myName:string = 'cloer'
const age:number = 13
const married:boolean = false

// Array
const weekdays:string[] = ['mon', 'tue', 'wed']
const weekend:Array<string> = ['sat', 'sun']

// tuple
const user:[string, number] = [myName, age]

// void
const voidFunc = ():void => {
    // No return
}

// never
const naverFunc1 = ():never=>{
    while(true){
        // Infinite loop
    }
}
const naverFunc2 = ():never=>{
    throw new Error() // always throw error
}

// enum
enum Score {
    C, // 0
    B = 3, // 3
    A // 4
}
console.log(Score[4]) // A
console.log(Score.C) //0

enum City {
    Seoul = 'Korea',
    Toronto = 'Canada',
    NewYork = 'USA'
}
console.log(City.NewYork) // USA

const myScore:Score = Score.C
const myCity = City.Seoul
console.log(myScore) // 0
console.log(myCity) // Korea

// null, undefined

const n:null = null
const u:undefined = undefined