> For the complete documentation index, see [llms.txt](https://olddocs.exivity.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://olddocs.exivity.io/2.3.1/diving-deeper/extract/language.md). # Language This article links to detailed descriptions of all the statements supported by USE script. These descriptions assume knowledge of the [USE script basics](/2.3.1/diving-deeper/extract/basics-1.md). ## Statement reference | Statement | Description | | ------------------------------------------------------------------------------------------------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------- | | [aws\_sign\_string](/2.3.1/diving-deeper/extract/language/aws_sign_string.md) | Create an AWS4-HMAC-SHA256 signature value | | [basename](/2.3.1/diving-deeper/extract/language/basename.md) | Extract the filename from path + filename string | | [buffer](/2.3.1/diving-deeper/extract/language/buffer.md) | Create a named buffer | | [clear](/2.3.1/diving-deeper/extract/language/clear.md) | Delete any defined [HTTP](/2.3.1/diving-deeper/extract/language/http.md) headers | | [csv](/2.3.1/diving-deeper/extract/language/csv.md) | Create a CSV file | | [discard](/2.3.1/diving-deeper/extract/language/discard.md) | Delete a named [buffer](/2.3.1/diving-deeper/extract/language/buffer.md) | | [encode](/2.3.1/diving-deeper/extract/language/encode.md) | Base16 or base64 encode data | | [encrypt](/2.3.1/diving-deeper/extract/language/encrypt.md) | Encrypt a [variable](/2.3.1/diving-deeper/extract/language/var.md) | | [escape](/2.3.1/diving-deeper/extract/language/escape.md) | Escape quotes in a [variable](/2.3.1/diving-deeper/extract/language/var.md) value or named [buffer](/2.3.1/diving-deeper/extract/language/buffer.md) | |

exit\_loop
loop\_exit

| Break out of a loop | | [foreach](/2.3.1/diving-deeper/extract/language/foreach.md) | Iterate over an array | | [get\_last\_day\_of](/2.3.1/diving-deeper/extract/language/get_last_day_of.md) | Set a variable to contain the number of the last day of a specified month | | [gosub](/2.3.1/diving-deeper/extract/language/gosub.md) | Call a [subroutine](/2.3.1/diving-deeper/extract/language/subroutine.md) | | [gunzip](/2.3.1/diving-deeper/extract/language/gunzip.md) | Inflate GZIP data | | [hash](/2.3.1/diving-deeper/extract/language/hash.md) | Generate an SHA256 or HMACSHA256 hash | | [http](/2.3.1/diving-deeper/extract/language/http.md) | Execute an HTTP request | | [if](/2.3.1/diving-deeper/extract/language/if.md) | Conditionally execute statements | | [json](/2.3.1/diving-deeper/extract/language/json.md) | Format JSON data | | [loglevel](/2.3.1/diving-deeper/extract/language/loglevel.md) | Change the logging level | | [loop](/2.3.1/diving-deeper/extract/language/loop.md) | Execute statements repeatedly | | [match](/2.3.1/diving-deeper/extract/language/match.md) | Search using a regular expression | | [pause](/2.3.1/diving-deeper/extract/language/pause.md) | Suspend script execution | | [print](/2.3.1/diving-deeper/extract/language/print.md) | Echo text to standard output | | [return](/2.3.1/diving-deeper/extract/language/return.md) | Explicitly return from a [subroutine](/2.3.1/diving-deeper/extract/language/subroutine.md) | | [save](/2.3.1/diving-deeper/extract/language/save.md) | Save a named buffer to disk | | [set](/2.3.1/diving-deeper/extract/language/set.md) | Specify a protocol parameter | | [subroutine](/2.3.1/diving-deeper/extract/language/subroutine.md) | Define a subroutine | | [terminate](/2.3.1/diving-deeper/extract/language/terminate.md) | End script execution | | [unzip](/2.3.1/diving-deeper/extract/language/unzip.md) | Decompress ZIP data in a named [buffer](/2.3.1/diving-deeper/extract/language/buffer.md) | | [uri](/2.3.1/diving-deeper/extract/language/uri.md) | URI (percent) encode a variable | | [var](/2.3.1/diving-deeper/extract/language/var.md) | Create or update a variable |