1.数组
let b1:number[]=[1,2,3] let b2:string[] = [‘asdf‘] let b3:boolean[]=[true,false] let b4:null[] = [null] let b5:undefined []= [undefined] let b6:any[] = [‘asd‘,2]
2.元组
let b7:[string,number] = [‘sdf‘,2]
3.type
// type可以是对象形式的 type people = {name:string,age:number} let b8:people = {name:‘zs‘,age:12}
// type 也可以是数组形式的 type test = [string,number] let b9:test = [‘1sdf2‘,1]
4.interface
// interface interface People { name:string,age:number } let b10:People[] = [{name:‘zs‘,age:12}]
原文：https://www.cnblogs.com/luguankun/p/13875256.html