What is the difference between iteration and recursion in C programming?

What is the difference between iteration and recursion in C programming?

Iteration involves repeating a block of code using loops, while recursion involves a function calling itself.

Can you give me an example of both in C?

Sure! For iteration, you can use a for loop to sum numbers. For recursion, a function can call itself to calculate factorial.

Which one is more efficient?

Iteration is generally more memory efficient, while recursion can be more elegant but may lead to stack overflow if too deep.

When should I use recursion instead of iteration?

Use recursion when the problem can be broken down into smaller subproblems, like tree traversals or factorial calculations.