pxt-calliope/docs/reference/serial/write-number.md
2016-07-11 11:13:13 -07:00

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# Serial Write Number
Write a number to the [serial](/device/serial) port.
```sig
serial.writeNumber(0);
```
### Parameters
* `value` is the [number](/reference/types/number) to write to the serial port
### Example: one through ten
This program repeatedly writes a 10-digit number to the serial port.
```blocks
basic.forever(() => {
serial.writeNumber(1234567890);
basic.pause(5000);
});
```
### Example: plot bar graph does serial
If you use the ``led.plotBarGraph`` function, it writes the number
being plotted to the serial port too.
```blocks
basic.forever(() => {
led.plotBarGraph(input.lightLevel(), 255)
basic.pause(10000);
})
```
### See also
[serial](/device/serial),
[serial write line](/reference/serial/write-line),
[serial write value](/reference/serial/write-value)