What does EXFMT do in RPGLE AS400

Understanding EXFMT in RPGLE
In this video, viewers gain insights into the EXFMT operation code used in RPGLE programming on the IBM i (AS/400) platform. The EXFMT operation is crucial for handling record formats in RPGLE, particularly when working with display files and database files.

• Definition of EXFMT: The EXFMT operation displays a record format on the screen and reads user input back into the program. It effectively combines the functionalities of both DISPLAY and READ operations.
• Usage Context: The video discusses scenarios where EXFMT is applicable, such as in interactive programs that require user input and feedback.
• Record Formats: An explanation of how record formats are defined in DDS (Data Description Specifications) and how they relate to RPGLE programs is provided.
• Example Code: The presenter showcases sample RPGLE code snippets demonstrating the implementation of EXFMT, including error handling and validation techniques.
• Best Practices: Tips on using EXFMT effectively, including considerations for screen design and user experience, are highlighted.
• Common Pitfalls: The video addresses common mistakes programmers make when using EXFMT and how to avoid them.

Conclusion: By the end of the video, viewers have a solid understanding of how to implement and utilize the EXFMT operation in their RPGLE applications, enhancing their ability to create interactive programs on the AS400 platform.