typescript

以下是一些 TypeScript 的基础语法示例：

1. 变量声明

```typescript
let num: number = 10;
let str: string = "hello";
let bool: boolean = true;
```

2. 函数声明

```typescript
function add(a: number, b: number): number {
  return a + b;
}

let result: number = add(5, 10);
console.log(result); // 15
```

3. 接口声明

```typescript
interface Person {
  name: string;
  age: number;
}

let person: Person = {
  name: "John",
  age: 30
};
```

4. 类声明

```typescript
class Animal {
  private name: string;

  constructor(name: string) {
    this.name = name;
  }

  public getName(): string {
    return this.name;
  }
}

let animal: Animal = new Animal("dog");
console.log(animal.getName()); // dog
```

5. 泛型声明

```typescript
function identity<T>(arg: T): T {
  return arg;
}

let output: string = identity<string>("hello");
console.log(output); // hello
```

6. 类型别名声明

```typescript
type Point = [number, number];

let point: Point = [10, 20];
console.log(point); // [10, 20]
```