How can you check if Karel can turn left?

The statement that Karel can always turn left is correct because Karel’s ability to turn left is not conditioned by the environment or specific rules. Unlike moving forward, which may depend on whether there is a wall in front of Karel, the command to turn left is universally available as part of Karel’s movement capabilities. Therefore, regardless of the circumstances, Karel can always execute a left turn.

This understanding is fundamental to programming Karel, as it allows programmers to incorporate left turns freely without having to impose conditions or checks first. The simplicity of this command contributes to Karel’s ease of use in teaching basic programming concepts, focusing on movement and control without unnecessary complexity. Hence, recognizing that Karel can always turn left simplifies the logic in creating Karel programs.