What would happen if you executed "turnLeft();" at each corner of an obstacle?

What would happen if you executed "turnLeft();" at each corner of an obstacle?

• A. Karel would turn forward into the wall.
• B. Karel would navigate around the obstacle.
• C. Karel would stop moving completely.
• D. Karel would lose track of its position.

Answer: (B)

Executing "turnLeft();" at each corner of an obstacle would lead Karel to navigate around the obstacle successfully. The command causes Karel to turn 90 degrees to the left, which effectively redirects its movement away from the wall or obstacle it encounters. For instance, when Karel reaches a corner, it can turn left to face a new direction, allowing it to continue its path without colliding with the obstacle. This maneuverability is crucial in programming Karel to navigate through a grid or environment filled with obstacles. By continuously turning left at corners, Karel can chart a path that circumvents obstacles rather than confronting them directly, thus enabling smooth navigation. This contrasts with other potential outcomes, such as moving forward into the wall or stopping entirely, which would impede Karel’s progress. The ability to turn and navigate illustrates fundamental concepts of control structures and movement in programming.

Executing "turnLeft();" at each corner of an obstacle would lead Karel to navigate around the obstacle successfully. The command causes Karel to turn 90 degrees to the left, which effectively redirects its movement away from the wall or obstacle it encounters.

For instance, when Karel reaches a corner, it can turn left to face a new direction, allowing it to continue its path without colliding with the obstacle. This maneuverability is crucial in programming Karel to navigate through a grid or environment filled with obstacles. By continuously turning left at corners, Karel can chart a path that circumvents obstacles rather than confronting them directly, thus enabling smooth navigation.

This contrasts with other potential outcomes, such as moving forward into the wall or stopping entirely, which would impede Karel’s progress. The ability to turn and navigate illustrates fundamental concepts of control structures and movement in programming.