基础类型：

• boolean：布尔值 true / false

let isDone: boolea = false;

• number: 数字类型

let decLiteral: number = 6;
let hexLiteral: number = 0xf00d;
let binaryLiteral: number = 0b1010;
let octalLiteral: number = 0o744;

• string:字符串

let name:string = 'bob';
name = 'smith'

也可以使用模板字符串``,它可以定义多行文本和内嵌表达式。

let name:string = `Gene`;
let age:number = 37;
let sentence:string = `Hello,my name is ${ name }.I'll be ${ age + 1} years old next month.`;

类似于下边sentence方式效果

let sentence: string = 'Hello,my name is '+ name + '.' + 'I'll be ' + (age + 1) + 'years old next mouth'

• 数组
  • 1. 在元素类型后面接上[],表示由此类型元素组成的一个数组

  let list: number[] = [1,2,3]
  

  • 2. 使用数组泛型,Array<元素类型>

  let list: Array<number> = [1,2,3]