What does iteration in algorithms primarily involve?

Iteration in algorithms primarily involves repeating a process until a specific condition is met. This concept is fundamental in programming and algorithm design, as it allows for the execution of a particular block of code multiple times. For example, in a loop structure, the code will continue to run until the defined condition evaluates to false. This is crucial for tasks such as traversing arrays, processing user input, or performing calculations that require multiple passes through the same code block.

The other options describe different aspects of programming or data manipulation. Executing code only once does not involve iteration, as it implies a singular execution without repetition. Creating complex data structures relates to how data is organized and stored but does not encompass the iterative process itself. Sorting data in ascending order is a specific operation that may utilize iteration but is not representative of the concept as a whole.