# ArrayAppend

Append a value to an array

## Method Signature

```
ArrayAppend(array=[modifiableArray], value=[any], merge=[boolean])
```

### Arguments

| Argument | Type              | Required | Description                                                                                                                                                          | Default |
| -------- | ----------------- | -------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------- |
| `array`  | `modifiableArray` | `true`   | The array to which the element should be appended.                                                                                                                   |         |
| `value`  | `any`             | `true`   | The element to append. Can be any type.                                                                                                                              |         |
| `merge`  | `boolean`         | `false`  | <p>If true, the value is assumed to be an array and the elements of the array are appended to the array. If false, the value is<br>appended as a single element.</p> | `false` |

## Examples

### Append a value to an array

Uses the arrayAppend function to append a value to the end of the array

[Run Example](https://try.boxlang.io/?code=eJwrzs9NdSwqSqxUsFWIVuDiNNTh4jQCYmOuWGuuRJCEY0FBal6KhkIxTKWOgomCpjVXeVFmSap%2FaUlBaYmGglewv19walFmYk5mVSqSWgVNkFIA6BUetw%3D%3D)

```java
someArray = [ 
	1,
	2,
	3
];
arrayAppend( someArray, 4 );
writeOutput( JSONSerialize( someArray ) );

```

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

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

Invoking the append function on an array is the same as running arrayAppend.

[Run Example](https://try.boxlang.io/?code=eJwrzs9NdSwqSqxUsFWIVuDiNNTh4jQCYmOuWGuuYpikXmJBQWpeioaCiYKmNVd5UWZJqn9pSUFpiYaCV7C%2FX3BqUWZiTmZVqoYCXIuCJkgpACxLHJo%3D)

```java
someArray = [ 
	1,
	2,
	3
];
someArray.append( 4 );
writeOutput( JSONSerialize( someArray ) );

```

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

### Append more than one item

You can merge two arrays when third parameter is set to true.

[Run Example](https://try.boxlang.io/?code=eJwrzs9NdSwqSqxUsFWIVuDiNNTh4jQCYmOuWGsusIRjQUFqXoqGQjFMpY5CNBenCVCNKRCbccXqKJQUlaYqaFpzlRdllqS6lOYWaCh4Bfv7BacWZSbmZFalImlW0AQpBACAdyFm)

```java
someArray = [ 
	1,
	2,
	3
];
ArrayAppend( someArray, [
	4,
	5,
	6
], true );
writeDump( JSONSerialize( someArray ) );

```

Result: \[1,2,3,4,5,6]

### Additional Examples

[Run Example](https://try.boxlang.io/?code=eJy9kL0KwkAQhOvsU0ypsBDyc0kgWASs9QHCFYpX3nlc7grf3hVBr4iCjcU0s7M7H%2BuSPZuwYIcZVFRMRS1qRC3pkaYQTrfJe%2BMuG7hnlqGwHWmfrH95YqAscUzRp7jIrYpRMxpG%2B4hrcu%2BelRp7DeaQJ5RMOlEvGj6D5Hs%2FIc1QjI7RMwbof%2FAxYkhmjZK%2BfC6DpDtjNG%2Bu)

```java
numbers = [ 
	1,
	2,
	3,
	4
];
ArrayAppend( numbers, 5 );
Dump( numbers ); // Outputs [ 1, 2, 3, 4, 5 ]
numbers = [
	1,
	2,
	3,
	4
];
moreNumbers = [
	5,
	6,
	7,
	8
];
ArrayAppend( numbers, moreNumbers );
Dump( numbers ); // Outputs [ 1, 2, 3, 4, [ 5, 6, 7, 8 ] ]
numbers = [
	1,
	2,
	3,
	4
];
moreNumbers = [
	5,
	6,
	7,
	8
];
ArrayAppend( numbers, moreNumbers, true );
Dump( numbers );
 // Outputs [ 1, 2, 3, 4, 5, 6, 7, 8 ]

```

## Related

* [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)
* [ArrayPrepend](/boxlang-language/reference/built-in-functions/array/arrayprepend.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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