> For the complete documentation index, see [llms.txt](https://pm1100tm.gitbook.io/devnote/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://pm1100tm.gitbook.io/devnote/snippet/undefined-1.md).

# 진수전환

## 2진수를 10진수로

```javascript
const n = '101';
const r = parseInt(n, 2); // 5
```

## 10진수를 2진수로

```javascript
const n = 5;
const r = n.toString(2); // 101
```