> For the complete documentation index, see [llms.txt](https://yamoo9.gitbook.io/typescript/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://yamoo9.gitbook.io/typescript/classes/static.md).

# 스태틱 속성, 메서드

## 정적 속성/메서드 <a href="#static-properties" id="static-properties"></a>

클래스를 통해 인스턴스를 생성할 필요 없이, 클래스의 속성 또는 메서드를 사용하고자 한다면 `static` 키워드를 사용해 속성, 메서드를 정의합니다.

```typescript
class Mathmatics {

  // 스태틱 속성
  static PI:number = Math.PI;

  // 스태틱 메서드
  // circumference = 둘레(원주)
  static calcCircumference(radius:number) :number {
    return this.PI * radius * 2;
  }

  static calcCircleWidth(radius:number): number {
    return this.PI * Math.pow(radius, 2);
  }

}

// radius = 반지름
let radius = 4;

console.log('PI(원주율) = ', Mathmatics.PI);
console.log(`반지름이 ${radius}인 원의 넓이: πr² = `, Mathmatics.calcCircleWidth(radius));
console.log(`반지름이 ${radius}인 원의 둘레: 2πr = `, Mathmatics.calcCircumference(radius));
```

## 실습 <a href="#practice" id="practice"></a>

{% embed url="<https://stackblitz.com/edit/ts-statics?embed=1&file=index.ts&hideExplorer=0&hideNavigation=0&view=editor>" %}

## 참고 <a href="#reference" id="reference"></a>

{% embed url="<https://www.typescriptlang.org/docs/handbook/classes.html#static-properties>" %}
TypeScript - 스태틱 속성/메서드
{% endembed %}


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