函数的传参

  1. function fun(s:string):string{
  2.     console.log(s);
  3.     return s;
  4. }

默认参数

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