RAPTOR is a flowchart-based programming environment, designed specifically to help students visualize their algorithms and avoid syntactic baggage. RAPTOR programs are created visually and executed visually by tracing the execution through the flowchart. Required syntax is kept to a minimum. Students prefer using flowcharts to express their algorithms, and are more successful creating algorithms using RAPTOR than using a traditional language or writing flowcharts without RAPTOR.
Are you interested in running RAPTOR on Chromebooks, iPads, or just in a browser? Check out the pre-release here!. This is NOT fully tested. Send feedback via
A Multiplatform version of RAPTOR is now available for Windows, Mac and Linux built on top of [Avalonia]! See the downloads section below. Uses fonts from Noto Sans CJK for internationalization. Key differences:
Figure 1 RAPTOR for Windows
Figure 2 RAPTOR Avalonia
Papers on RAPTOR application:
RAPTOR referenced in following books or publications:
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The ultimate combines airy, breathable fabrics with chic silhouettes, serving as the versatile foundation for any 2026 holiday wardrobe . As temperatures rise and travel plans take shape, finding that perfect, reliable top—the one that works with shorts, skirts, or over swimwear—is key to packing light and looking effortless.
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According to Lonely Planet’s list of the 21 best summer destinations for 2026, Croatia takes the #1 spot. Travelers are increasingly prioritizing nature-focused itineraries and scenic escapes, and Croatia’s Dalmatian Coast delivers exactly that. With its stunning Adriatic coastline, over a thousand islands, and historic cities like Dubrovnik and Split, it’s a destination that feels both intentional and unforgettable. Late May is an ideal time to visit Dubrovnik before the summer heat and heavy crowds arrive.
If you're looking for the absolute top destinations for a May or summer vacation, this comprehensive guide will take you from the sun-kissed islands of Greece and the fragrant fields of Japan to the stunning national parks of the American West. Read on to discover where to go, why it's the perfect time, and how to plan an unforgettable trip. The ultimate combines airy, breathable fabrics with chic
: A lightweight, sheer layer that doubles as a bikini cover-up and a stylish top when paired with high-waisted denim shorts. Images could not be shown right now. Please try again. Tips for Styling Your May Vacation Top Monochrome Sets
Choosing the right top ensures comfort during long flights, walking tours, and beachside dinners. This comprehensive guide highlights the essential styles, fabrics, and packing strategies for your upcoming summer travel. Key Attributes of a Great Vacation Top She paired it with gold hoop earrings and
Here are some of the top activities to consider for your summer vacation in May:
Here are some of the top destinations to consider for your summer vacation in May:
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Do you want more older versions? Check out older versions of RAPTOR here
Did you know RAPTOR has modes? By default, you start in Novice mode. Novice mode has a single global namespace for variables. Intermediate mode allows you to create procedures that have their own scope (introducing the notion of parameter passing and supports recursion). Object-Oriented mode is new (in the Summer 2009 version)
RAPTOR is freely distributed as a service to the CS education community. RAPTOR was originally developed by and for the US Air Force Academy, but its use has spread and RAPTOR is now used for CS education in over 30 countries on at least 4 continents. Martin Carlisle is the primary maintainer, and is a professor at Texas A&M University.
Below handouts are by Elizabeth Drake, edited from Appendix D of her book, Prelude to Programming: Concepts and Design, 5th Edition, by Elizabeth Drake and Stewart Venit, Addison-Wesley, 2011. Linked here with author's permission.
Comments, suggestions, and bug reports are welcome. If you have a comment, suggestion or bug report, send an email to .
David Cox has put together a user forum at http://raptorflowchart.freeforums.org. This provides a place for users to exchange ideas, how tos, etc. Note however, that feedback for the author should be sent by email rather than posting on this forum.
Randy Bower has some YouTube tutorials at http://www.youtube.com/user/RandallBower. You can also search YouTube for "RAPTOR flowchart".
The UML designer is based on NClass, an open-source UML Class Designer. NClass is licensed under the GNU General Public License. The rest of RAPTOR, by US Air Force policy, is public domain. Source is found here. RAPTOR is written in a combination of A# and C#. Unfortunately, I don't have the time to provide support on compilation issues