2.2.1、函数的传参

  1. function fun(s:string):string{
  2.     console.log(s);
  3.     return s;
  4. }
  1. //默认参数
  2. function fun(s:string="hello world"):string{
  3.     console.log(s);
  4.     return s;
  5. }
  6. fun("good");       //good
  1. function func(s:any):any{
  2.     return s;
  3. }
  4. //返回值是任意类型