let a: number = 42;
let b: string = "hello";
let c: boolean = true;
let d: any = null;
let e: never;
let f: unknown = undefined;
let g: object = {};
let h: symbol = Symbol();
let i: bigint = 9007199254740991n;
let j: void = undefined;

type Complex = {
  num: number;
  str: string;
  bool: boolean;
  opt?: any;
  nothing: never;
  unk: unknown;
  obj: object;
  sym: symbol;
  big: bigint;
};
