> For the complete documentation index, see [llms.txt](https://april.gitbook.io/learning-js/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://april.gitbook.io/learning-js/chapter-7./7.5.md).

# 7.5 변수 숨기기

```javascript
{
    // 외부 블록
    let x = 'blue';
    console.log(x);
    
    {
        // 내부 블록
        let x = 3;
        console.log(x); // 3
    }
    
    console.log(x); // blue
}

console.log(typeof x) // "undefined"; x는 스코프에 있지 않음
```