In Karel programming, what is the purpose of a function?

A function in Karel programming serves to execute repetitive tasks efficiently. By encapsulating a sequence of instructions within a function, a programmer can avoid rewriting the same code multiple times, promoting code reuse and simplifying the overall program structure. This approach not only streamlines the code but also makes it easier to read and maintain.

Functions can be called as needed throughout a program, allowing Karel to perform complex actions without redundant coding. For instance, if Karel needs to perform a particular task several times in different parts of the program, a function can be defined to handle that task, and Karel can invoke it whenever necessary.

Other options do not align with the core purpose of functions in programming. For example, controlling Karel's movements or defining its starting position are achieved through specific commands and instructions rather than through functions. Randomly changing Karel's direction does not typically fall under the efficiency and organization that functions provide. Thus, recognizing the role of functions in executing repetitive tasks is crucial for effective programming in Karel.