pxt-calliope/docs/reference/radio/send-number.md

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# Send Number
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Broadcast a [number](/reference/types/number) to other micro:bits connected via ``radio``.
```sig
radio.sendNumber(0);
```
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### Parameters
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* ``value`` - a [number](/reference/types/number) to send.
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### Simulator
This function only works on the micro:bit, not in browsers.
### Example: Broadcasting acceleration
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This example broadcasts the value of your micro:bit's ``acceleration``
in the `x` direction (left and right) to other micro:bits. This kind
of program might be useful in a model car or model rocket.
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```blocks
input.onButtonPressed(Button.A, () => {
radio.sendNumber(input.acceleration(Dimension.X))
})
```
### Light level sender
This example broadcasts the level of the light around it.
You can do some interesting things with it if you use it along with the
[Mailbot](/reference/radio/receive-number) example.
```blocks
radio.setGroup(99)
basic.forever(() => {
let level = input.lightLevel()
radio.sendNumber(level)
})
```
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### See also
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[receive number](/reference/radio/receive-number), [on data received](/reference/radio/on-data-received)