1. 布尔类型

    let isDone: boolean = true;
    let notDone: boolean = false;

2. 数值类型

    let decLiteral: number = 6; // 十进制
    let hexLiteral: number = 0xf00d; // 十六进制
    let binaryLiteral: number = 0b1010; // 二进制
    let octalLiteral: number = 0o744; // 八进制

3. 字符串类型

    let intro: string = "I'm a coder";
    let age: number = 18;
    let info: string = intro + ageInfo; // 语句形式

4. 数组形式

    let arr1:number[] = [1, 2, 3];
    let arr2:Array<number> = [1, 2, 3];