ts

const [teacherType, setTeacherType] = useState<1 | 2 | 3 | null>(null)

let a: string = 'text'; // 문자열
let b: number = 0; // 숫자형
let c: boolean = true; // 논리형
let d: any = true; // 어떤 타입이 올지 모를 때
let e: string | number = '0'; // 문자열이나 숫자가 올 때

export type TSomeMemberTier = "Basic" | "Premium" | "Admin";

export interface CampusDataModel {
  name: string;
  age: number;
  address: string;
  tier: TSomeMemberTier;
}

  const [campusData, setCampusData] = useState<CampusDataModel | null>(null)