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[Home](./index.md) &gt; [bitburner](./bitburner.md) &gt; [NS](./bitburner.ns.md) &gt; [alert](./bitburner.ns.alert.md)

## NS.alert() method

Open up a message box.

**Signature:**

```typescript
alert(msg: string): void;
```

## Parameters

|  Parameter | Type | Description |
|  --- | --- | --- |
|  msg | string | Message to alert. |

**Returns:**

void