> For the complete documentation index, see [llms.txt](https://boxlang.ortusbooks.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/array/arrayprepend.md).

# ArrayPrepend

Append a value to the start an array

## Method Signature

```
ArrayPrepend(array=[modifiableArray], value=[any])
```

### Arguments

| Argument | Type              | Required | Description             | Default |
| -------- | ----------------- | -------- | ----------------------- | ------- |
| `array`  | `modifiableArray` | `true`   | The array to prepend to |         |
| `value`  | `any`             | `true`   | The value to prepend    |         |

## Examples

### Prepend a value to an array

Uses the arrayPrepend function to prepend a value to the beginning of an array and shifts the positions of the existing elements.

[Run Example](https://try.boxlang.io/?code=eJwrzs9NdSwqSqxUsFWIVuDiNNbh4jQCYkOuWGuuRJBEQFFqQWpeioZCMUypjoKJgqY1V3lRZkmqS2luAZIUSBwA6XgYvw%3D%3D)

```java
someArray = [ 
	3,
	2,
	1
];
arrayPrepend( someArray, 4 );
writeDump( someArray );

```

Result: \[4,3,2,1]

### Prepend a value to an array using the Array member function

Invoking the prepend function on an array is the same as running arrayPrepend.

[Run Example](https://try.boxlang.io/?code=eJxLyU8uyS9yLCpKrFSwVYhW4OJUck1OzkktLsnPU9IB8kJS8%2FIS80rA7ODczJIMMMs5sSAxJyVTiSvWmisFYYReQVFqQWpeioaCkkdpUYmSgqY1V3lRZkmqS2lugYYCkkqQDABQTSa%2B)

```java
doctorArray = [ 
	"Eccleston",
	"Tennant",
	"Smith",
	"Capaldi"
];
doctorArray.prepend( "Hurt" );
writeDump( doctorArray );

```

Result: \['Hurt','Eccleston','Tennant','Smith','Capaldi']

### Additional Examples

[Run Example](https://try.boxlang.io/?code=eJwrzs9NdSwqSqxUsFWIVuDiNNbh4jQCYkOuWGuuRJBEQFFqQWpeioZCMUypjoKJgqY1V0ppbgGSKEhIX18hNzU3KbVIIa00L7kkMz%2BPKyU%2FuSS%2FKDwjH24LF6dSeEZmSUlidmqREtAqpZDUvLzEvBIw2wksCrIcVaNeAcwZSh6lRSVKCAegWQAUBwDY4UIY)

```java
someArray = [ 
	3,
	2,
	1
];
arrayPrepend( someArray, 4 );
dump( someArray );
// member function
doctorWhoArray = [
	"Whittaker",
	"Tennant",
	"Baker"
];
doctorWhoArray.prepend( "Hurt" );
dump( doctorWhoArray );

```

## Related

* [ArrayAppend](/boxlang-language/reference/built-in-functions/array/arrayappend.md)
* [ArrayAvg](/boxlang-language/reference/built-in-functions/array/arrayavg.md)
* [ArrayChunk](/boxlang-language/reference/built-in-functions/array/arraychunk.md)
* [ArrayClear](/boxlang-language/reference/built-in-functions/array/arrayclear.md)
* [ArrayContains](/boxlang-language/reference/built-in-functions/array/arraycontains.md)
* [ArrayContainsNoCase](/boxlang-language/reference/built-in-functions/array/arraycontainsnocase.md)
* [ArrayDelete](/boxlang-language/reference/built-in-functions/array/arraydelete.md)
* [ArrayDeleteAt](/boxlang-language/reference/built-in-functions/array/arraydeleteat.md)
* [ArrayDeleteNoCase](/boxlang-language/reference/built-in-functions/array/arraydeletenocase.md)
* [ArrayEach](/boxlang-language/reference/built-in-functions/array/arrayeach.md)
* [ArrayEvery](/boxlang-language/reference/built-in-functions/array/arrayevery.md)
* [ArrayFilter](/boxlang-language/reference/built-in-functions/array/arrayfilter.md)
* [ArrayFind](/boxlang-language/reference/built-in-functions/array/arrayfind.md)
* [ArrayFindAll](/boxlang-language/reference/built-in-functions/array/arrayfindall.md)
* [ArrayFindAllNoCase](/boxlang-language/reference/built-in-functions/array/arrayfindallnocase.md)
* [ArrayFindFirst](/boxlang-language/reference/built-in-functions/array/arrayfindfirst.md)
* [ArrayFindNoCase](/boxlang-language/reference/built-in-functions/array/arrayfindnocase.md)
* [ArrayFirst](/boxlang-language/reference/built-in-functions/array/arrayfirst.md)
* [ArrayFlatMap](/boxlang-language/reference/built-in-functions/array/arrayflatmap.md)
* [ArrayFlatten](/boxlang-language/reference/built-in-functions/array/arrayflatten.md)
* [ArrayGetMetadata](/boxlang-language/reference/built-in-functions/array/arraygetmetadata.md)
* [ArrayGroupBy](/boxlang-language/reference/built-in-functions/array/arraygroupby.md)
* [ArrayIndexExists](/boxlang-language/reference/built-in-functions/array/arrayindexexists.md)
* [ArrayInsertAt](/boxlang-language/reference/built-in-functions/array/arrayinsertat.md)
* [ArrayIsDefined](/boxlang-language/reference/built-in-functions/array/arrayisdefined.md)
* [ArrayLast](/boxlang-language/reference/built-in-functions/array/arraylast.md)
* [ArrayMap](/boxlang-language/reference/built-in-functions/array/arraymap.md)
* [ArrayMax](/boxlang-language/reference/built-in-functions/array/arraymax.md)
* [ArrayMedian](/boxlang-language/reference/built-in-functions/array/arraymedian.md)
* [ArrayMerge](/boxlang-language/reference/built-in-functions/array/arraymerge.md)
* [ArrayMid](/boxlang-language/reference/built-in-functions/array/arraymid.md)
* [ArrayMin](/boxlang-language/reference/built-in-functions/array/arraymin.md)
* [ArrayNew](/boxlang-language/reference/built-in-functions/array/arraynew.md)
* [ArrayNone](/boxlang-language/reference/built-in-functions/array/arraynone.md)
* [ArrayPop](/boxlang-language/reference/built-in-functions/array/arraypop.md)
* [ArrayPush](/boxlang-language/reference/built-in-functions/array/arraypush.md)
* [ArrayRange](/boxlang-language/reference/built-in-functions/array/arrayrange.md)
* [ArrayReduce](/boxlang-language/reference/built-in-functions/array/arrayreduce.md)
* [ArrayReduceRight](/boxlang-language/reference/built-in-functions/array/arrayreduceright.md)
* [ArrayReject](/boxlang-language/reference/built-in-functions/array/arrayreject.md)
* [ArrayResize](/boxlang-language/reference/built-in-functions/array/arrayresize.md)
* [ArrayReverse](/boxlang-language/reference/built-in-functions/array/arrayreverse.md)
* [ArraySet](/boxlang-language/reference/built-in-functions/array/arrayset.md)
* [ArrayShift](/boxlang-language/reference/built-in-functions/array/arrayshift.md)
* [ArraySlice](/boxlang-language/reference/built-in-functions/array/arrayslice.md)
* [ArraySome](/boxlang-language/reference/built-in-functions/array/arraysome.md)
* [ArraySort](/boxlang-language/reference/built-in-functions/array/arraysort.md)
* [ArraySplice](/boxlang-language/reference/built-in-functions/array/arraysplice.md)
* [ArraySum](/boxlang-language/reference/built-in-functions/array/arraysum.md)
* [ArraySwap](/boxlang-language/reference/built-in-functions/array/arrayswap.md)
* [ArrayToList](/boxlang-language/reference/built-in-functions/array/arraytolist.md)
* [ArrayToStruct](/boxlang-language/reference/built-in-functions/array/arraytostruct.md)
* [ArrayTranspose](/boxlang-language/reference/built-in-functions/array/arraytranspose.md)
* [ArrayUnique](/boxlang-language/reference/built-in-functions/array/arrayunique.md)
* [ArrayUnshift](/boxlang-language/reference/built-in-functions/array/arrayunshift.md)
* [ArrayZip](/boxlang-language/reference/built-in-functions/array/arrayzip.md)


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