# Convert a letter to its regional indicator emoji

Map a–z to the regional indicator symbols 🇦–🇿.

Canonical: https://1loc.dev/string/convert-a-letter-to-associate-emoji/
Version: 1.0.0
Runtime: JavaScript · Node.js 22 / modern browsers
Verification: Local fixtures; no external services
Updated: 2026-10-28

## Implementation

```javascript
function letterToEmoji(letter) { return String.fromCodePoint(letter.toLowerCase().charCodeAt(0) + 127365); }
```

## Input

```json
"b"
```

## Expected output

```json
"🇧"
```

## Edge case

Input:
```json
"Z"
```
Output:
```json
"🇿"
```

## Limits

- Input is one ASCII letter. Two indicators side by side render as a country flag in many fonts.

The lab validates types and size before calling this function. Add equivalent validation at your own trust boundary.

## Source and license

Original: https://github.com/phuocng/1loc/blob/14b481cf60dff1620ab1bb99a43b1f68068cdd9b/contents/convert-a-letter-to-associate-emoji.mdx
Author: Nguyen Huu Phuoc and original contributors
Contributors: See original repository history
Source commit: 14b481cf60dff1620ab1bb99a43b1f68068cdd9b
Copyright (c) 2020 phuoc-ng
License: MIT — https://1loc.dev/licenses/
Maintainer: Oveyon
Modifications: Validates a single ASCII letter before mapping it. Original MDX retained as inert source evidence.