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

## NS.readPort() method

Read data from a port.

**Signature:**

```typescript
readPort(portNumber: number): PortData;
```

## Parameters

|  Parameter | Type | Description |
|  --- | --- | --- |
|  portNumber | number | Port to read from. Must be a positive integer. |

**Returns:**

[PortData](./bitburner.portdata.md)

The data read.

## Remarks

RAM cost: 0 GB

Read data from that port. A port is a serialized queue. This function will remove the first element from that queue and return it. If the queue is empty, then the string “NULL PORT DATA” will be returned.

