# Using Amazon Q Developer for full function generation Amazon Q can generate an entire function based on a comment that you've written. As you finish your comment Amazon Q will suggest a function signature. If you accept the suggestion, Amazon Q automatically advances your cursor to the next part of the function and makes a suggestion. Even if you enter an additional comment or line of code in between suggestions, Amazon Q will refactor based on your input. ------ #### [ C ] ![\[An example of the full function completion feature using C.\]](http://docs.aws.amazon.com/amazonq/latest/qdeveloper-ug/images/full-function-completion-c-plus.gif) ------ #### [ C\$1\$1 ] ![\[An example of the full function completion feature using C++.\]](http://docs.aws.amazon.com/amazonq/latest/qdeveloper-ug/images/full-function-completion-c-plus.gif) ------ #### [ JavaScript ] In the following example, the user generates, and then edits, a full function based on a set of comments. ![\[An example of the full-function generation feature.\]](http://docs.aws.amazon.com/amazonq/latest/qdeveloper-ug/images/javascript_lambda_FullFunctionGeneration.gif) In the following image, a user has written a function signature for reading a file from Amazon S3. Amazon Q then suggests a full implementation of the `read_from_s3` method. ![\[\]](http://docs.aws.amazon.com/amazonq/latest/qdeveloper-ug/images/whisper-function-read-from-s3.png) **Note** Sometimes, as in the previous example, Amazon Q includes `import` statements as part of its suggestions. As a best practice, manually move these `import` statements to the top of your file. As another example, in the following image, a user has written a function signature. Amazon Q then suggests a full implementation of the `quicksort` method. ![\[\]](http://docs.aws.amazon.com/amazonq/latest/qdeveloper-ug/images/whisper-function-quicksort.png) Amazon Q considers past code snippets when making suggestions. In the following image, the user in the previous example has accepted the suggested implementation for `quicksort` above. The user then writes another function signature for a generic `sort` method. Amazon Q then suggests an implementation based on what has already been written. ![\[\]](http://docs.aws.amazon.com/amazonq/latest/qdeveloper-ug/images/whisper-function-from-context-sort.png) In the following image, a user has written a comment. Based on this comment, Amazon Q then suggests a function signature. ![\[\]](http://docs.aws.amazon.com/amazonq/latest/qdeveloper-ug/images/whisper-comment-binary-search.png) In the following image, the user in the previous example has accepted the suggested function signature. Amazon Q can then suggest a complete implementation of the `binary_search` function. ![\[\]](http://docs.aws.amazon.com/amazonq/latest/qdeveloper-ug/images/whisper-function-binary-search.png) ------ #### [ Java ] The following list contains examples of how Amazon Q makes suggestions and advances you through the entire process of creating a function. 1. In the following example, a user inputs a comment. Amazon Q suggests a function signature. After the user accepts that suggestion, Amazon Q suggests a function body. ![\[An example of a function generated from a comment.\]](http://docs.aws.amazon.com/amazonq/latest/qdeveloper-ug/images/cw-c9-function-from-comment.gif) 1. In the image below, a user inputs a comment in the body of the function prior to accepting a suggestion from Amazon Q. On the following line, Amazon Q generates a suggestion based on the comment. ![\[An example of a function generated from a comment inside an existing block of code.\]](http://docs.aws.amazon.com/amazonq/latest/qdeveloper-ug/images/cw-c9-function-from-comment-within-block.gif) ------ #### [ C\$1 ] In the following example, Amazon Q recommends a full function. ![\[Function declaration for ListTables with AmazonDynamoDBClient parameter in code editor.\]](http://docs.aws.amazon.com/amazonq/latest/qdeveloper-ug/images/c-sharp-full-function.gif) ------ #### [ TypeScript ] In the following example, Amazon Q generates a function based on the user's docstrings. ![\[An example of the full function completion feature.\]](http://docs.aws.amazon.com/amazonq/latest/qdeveloper-ug/images/typescript_vscode_function.gif) ------ #### [ Python ] Amazon Q can generate an entire function based on a comment that you've written. As you finish your comment, Amazon Q will suggest a function signature. If you accept the suggestion, Amazon Q automatically advances your cursor to the next part of the function and makes a suggestion. Even if you enter an additional comment or line of code in between suggestions, Amazon Q will refactor based on your input. In the following example, Amazon Q generates both a full function and the corresponding unit test. ![\[An example of the full function completion feature.\]](http://docs.aws.amazon.com/amazonq/latest/qdeveloper-ug/images/python_pycharm_fullfunction_unittests.GIF) The following list contains examples of how Amazon Q makes suggestions and advances you through the entire process of creating a function. 1. In the image below, a user has input a comment. The function signature, located below the comment, is a suggestion from Amazon Q. ![\[alt_text\]](http://docs.aws.amazon.com/amazonq/latest/qdeveloper-ug/images/cw-jb-comment-062022.png) 1. In the image below, the user has accepted the Amazon Q suggestion for a function signature. Accepting the suggestion automatically advanced the cursor and Amazon Q has made a new suggestion for the function body. ![\[alt_text\]](http://docs.aws.amazon.com/amazonq/latest/qdeveloper-ug/images/cw-jb-commentfunctionadvance-062022.png) 1. In the image below, a user input a comment in the body of the function prior to accepting a suggestion from Amazon Q. On the following line, Amazon Q has generated a new suggestion based on the content of the comment. ![\[generateing a new suggestion based on the content of a comment\]](http://docs.aws.amazon.com/amazonq/latest/qdeveloper-ug/images/cw-jb-commentfunction-062022.png) In this example, Amazon Q recommends a full function after the user types part of the signature. ![\[An example of the full function feature.\]](http://docs.aws.amazon.com/amazonq/latest/qdeveloper-ug/images/python_sagemakerstudio_fullfunction.gif) ------