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36 lines
1.1 KiB
Markdown
36 lines
1.1 KiB
Markdown
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[Home](./index.md) > [bitburner](./bitburner.md) > [NS](./bitburner.ns.md) > [writePort](./bitburner.ns.writeport.md)
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## NS.writePort() method
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Write data to a port.
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**Signature:**
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```typescript
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writePort(portNumber: number, data: any): any;
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```
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## Parameters
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| Parameter | Type | Description |
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| --- | --- | --- |
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| portNumber | number | Port to write to. Must be a positive integer. |
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| data | any | Data to write, it's cloned with structuredClone(). |
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**Returns:**
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any
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The data popped off the queue if it was full, or null if it was not full.
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## Remarks
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RAM cost: 0 GB
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Write data to the given Netscript port.
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There is a limit on the maximum number of ports, but you won't reach that limit in normal situations. If you do, it usually means that there is a bug in your script that leaks port data. A port is freed when it does not have any data in its underlying queue. `ns.clearPort` deletes all data on a port. `ns.readPort` reads the first element in the port's queue, then removes it from the queue.
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