The Unofficial C For Dummies Website

This page supports the C programming books written by Dan Gookin, as well as the C language training courses offered online at LinkedIn Learning. All coders are welcome.

I have been unwillingly retired from my book-writing and online-training careers, thanks to AI. Hopefully, I will create more material in the future. Even so, this site will remain active through 2028.

Recent Lessons

Two File Descriptors?: August 22, 2026 Yes, you can have two file descriptors referencing the same open file. It's weird, and potentially useful.
Duping a File in the Raw: August 15, 2026 What happens when you have two file handles referencing the same file?
Rubbing a File Raw: August 8, 2026 Raw file access uses file descriptors, which have some interesting properties.
How Much Stuff Can You Cram In There?: August 1, 2026 The for statement can be overloaded with lotsa stuff.
Creating Your Own Library: July 25, 2026 Why not put all your favorite functions into their own library?

Lessons are posted each Saturday; see the blog for all the Lessons

This Month's Exercise

Ramanujan Nested Radicals: August 1, 2026 Time to squeeze another math thing into a recursive function.

Exercises are posted on the first of the month; see the blog for all the Exercises

Current Titles

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For support on my older C titles: Beginning C Programming, C All-In-One reference and C For Dummies.

Online Training

Online training is provided through Linkedin Learning, a subscription service. Click here to see my available courses. New courses are frequently available and updated.

"For Dummies" is a trademark or registered trademark of John Wiley.
This site is the online companion to the various
C language titles written by Dan Gookin.