# commaAnd

**Kind:** Function

**Source:** [`atloria-monorepo/libs/parser-core/src/techdocs/subsystem-narrative.ts`](https://github.com/sherkety/atloria/blob/main/atloria-monorepo/libs/parser-core/src/techdocs/subsystem-narrative.ts#L110)

`a, b, c and d` — the shape every list sentence on the page uses.

## Signature

```ts
function commaAnd(parts: string[]): string
```

## Parameters

| Name | Type |
|---|---|
| `parts` | `string[]` |

**Returns:** `string`