# What does settings writebuffer do

**URL:** <https://forum.makecode.com/t/what-does-settings-writebuffer-do/18692>\
**Category:** Arcade\
**Created:** [March 23, 2023, 5:10pm UTC](https://forum.makecode.com/t/what-does-settings-writebuffer-do/18692 "2023-03-23T17:10:44Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![technonux](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.makecode.com/technonux/32/7924_2.png) [@technonux](https://forum.makecode.com/u/technonux)\
**Post date:** [March 23, 2023, 5:10pm UTC](https://forum.makecode.com/t/what-does-settings-writebuffer-do/18692/1 "2023-03-23T17:10:44Z")

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what does settings.writebuffer() do

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**Author:** ![richard](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.makecode.com/richard/32/5417_2.png) [@richard](https://forum.makecode.com/u/richard)\
**Post date:** [March 23, 2023, 5:25pm UTC](https://forum.makecode.com/t/what-does-settings-writebuffer-do/18692/2 "2023-03-23T17:25:21Z")

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It’s saves a Buffer. Buffers are arrays of bytes; they are mostly used for storing custom data in a very efficient way:

```typescript
// Creates a buffer that is 8 bytes long
const data = control.createBuffer(8);

// Sets the byte at index 0. A single byte can only
// hold numbers 0-255
data[0] = 123;

// To store bigger numbers, you can use Buffer.setNumber. This writes
// a 64 bit floating point number into the buffer (8 bytes long)
data.setNumber(NumberFormat.Float64LE, 0, 3.14159267)

// You can read numbers out the same way
const pi = data.getNumber(NumberFormat.Float64LE, 0)

```

In general it’s better to use the number array method instead unless you really need to use this

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<div class="post-metadata">

**Author:** ![technonux](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.makecode.com/technonux/32/7924_2.png) [@technonux](https://forum.makecode.com/u/technonux)\
**Post date:** [March 23, 2023, 5:26pm UTC](https://forum.makecode.com/t/what-does-settings-writebuffer-do/18692/3 "2023-03-23T17:26:10Z")

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thanks you