[Home](./index.md) > [bitburner](./bitburner.md) > [NS](./bitburner.ns.md) > [writePort](./bitburner.ns.writeport.md) ## NS.writePort() method Write data to a port. Signature: ```typescript writePort(port: number, data: string | number): PortData | null; ``` ## Parameters | Parameter | Type | Description | | --- | --- | --- | | port | number | | | data | string \| number | | Returns: [PortData](./bitburner.portdata.md) \| null The data popped off the queue if it was full, or null if it was not full. ## Remarks RAM cost: 0 GB Write data to the given Netscript port.