Question
If Karel starts at Row 1 and Column 1, facing East, where will Karel be, and what direction will Karel be facing after running the following code? (Assume the world is 10x10 in size)
move();
turnLeft();
putBall();
turnLeft();
turnLeft();
turnLeft();
move();
turnLeft();
JavaScript
Row 3, Column 1, Facing North
Row 1, Column 4, Facing North
Row 1, Column 3, Facing South
Row 1, Column 3, Facing North
move();
turnLeft();
putBall();
turnLeft();
turnLeft();
turnLeft();
move();
turnLeft();
JavaScript
Row 3, Column 1, Facing North
Row 1, Column 4, Facing North
Row 1, Column 3, Facing South
Row 1, Column 3, Facing North
Answers
GPT-4o mini
Let's analyze the code step by step to determine Karel's final position and direction:
1. **Initial Position:** Karel starts at Row 1, Column 1, facing East.
2. **Code Execution:**
- `move();`
- Karel moves from (1, 1) to (1, 2) (still facing East).
- `turnLeft();`
- Karel turns to face North.
- `putBall();`
- Karel puts a ball at (1, 2). Position: (1, 2), Facing North.
- `turnLeft();`
- Karel turns to face West.
- `turnLeft();`
- Karel turns to face South.
- `turnLeft();`
- Karel turns to face East again.
- `move();`
- Karel moves from (1, 2) to (1, 3) (still facing East).
- `turnLeft();`
- Karel turns to face North.
After executing all the commands, Karel ends up at:
**Row 1, Column 3, Facing North.**
The correct answer, based on the provided options, is:
**Row 1, Column 3, Facing North.**
1. **Initial Position:** Karel starts at Row 1, Column 1, facing East.
2. **Code Execution:**
- `move();`
- Karel moves from (1, 1) to (1, 2) (still facing East).
- `turnLeft();`
- Karel turns to face North.
- `putBall();`
- Karel puts a ball at (1, 2). Position: (1, 2), Facing North.
- `turnLeft();`
- Karel turns to face West.
- `turnLeft();`
- Karel turns to face South.
- `turnLeft();`
- Karel turns to face East again.
- `move();`
- Karel moves from (1, 2) to (1, 3) (still facing East).
- `turnLeft();`
- Karel turns to face North.
After executing all the commands, Karel ends up at:
**Row 1, Column 3, Facing North.**
The correct answer, based on the provided options, is:
**Row 1, Column 3, Facing North.**