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Target=kids so removing all 'Important Security Considerations' for now.

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Ron Hale-Evans
2016-05-31 12:06:03 -07:00
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docs/reference/radio/receive-number.md
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Reads the next radio packet if any and returns the first number.
## Important Security Consideration
The functions in the ``radio`` namespace allow the BBC micro:bit to communicate with other micro:bits.
This API does not contain any form of encryption, authentication or authorization. It's purpose is solely for use as a teaching aid to demonstrate how simple communications operates, and to provide a sandpit through which learning can take place.
For serious applications, BLE should be considered a substantially more secure alternative.
```sig
radio.receiveNumber()
```
### Return value
* the first number [number](/reference/types/number) of the packet if any. `0` otherwise.