What are the difficult concepts to grasp in programming?

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Mark Green


My experience from teaching programming for years is that the following are sticking points:

• Insignificance of variable names (ie, that it doesn't matter to the computer what a variable is called)
• Pass by value and reference, explicit (pointers) or otherwise
• Floating point formats
• Recursion and recursive data structures
• Function/method structuring and refactoring
• Moving between control flow and event driven contexts
• Classes that are not singletons (thanks a bundle Java/C#!)
• Python’s for….else structure
• Where to put brackets in Lisp
• Anything to do with Prolog

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