How can Karel perform a task multiple times without manually coding it?

Karel can perform a task multiple times efficiently by using loops or defining a function. Loops allow Karel to repeat a sequence of instructions for a specific number of times or until a certain condition is met, which is instrumental in reducing the amount of repetitive code a programmer has to write. By defining a function, Karel can encapsulate a specific set of instructions that can be called upon as needed, promoting code reuse and organization. This method not only simplifies the code but also enhances readability and maintainability, as tasks are clearly defined and can be modified in one place without having to change multiple occurrences throughout the code.

Other approaches, such as copying and pasting code, can lead to redundancy and make it difficult to manage. Using recursion, while effective for certain types of problems, can be more complex than simply using loops for repetition in Karel's case. Additionally, variables are useful for storing data but do not, by themselves, facilitate the repetition of tasks.