Question

Karel starts at Row 1 and Column 1, facing East. After calling the stairStep function twice, where will Karel be and what direction will Karel be facing? (assume this is a SuperKarel program and the world is 10x10 in size)

function stairStep() {
move();
turnLeft();
move();
turnRight();
}
JavaScript


Row 2, Column 2, Facing North


Row 3, Column 3, Facing East


Row 3, Column 3, Facing West


Row 4, Column 4, Facing East

Answer 1

Let's break down what the `stairStep` function does step-by-step. The function contains the following instructions:

1. `move();` - Move one space forward in the current direction.
2. `turnLeft();` - Turn left 90 degrees from the current direction.
3. `move();` - Move one space forward in the new direction after turning left.
4. `turnRight();` - Turn right 90 degrees from the current direction.

Now, let's analyze how Karel moves when the `stairStep` function is called.

### First Call to `stairStep()`

1. **Starting position**: Row 1, Column 1, Facing East.
2. **`move();`** - Karel moves to Row 1, Column 2, still facing East.
3. **`turnLeft();`** - Karel turns left to face North.
4. **`move();`** - Karel moves to Row 2, Column 2, now facing North.
5. **`turnRight();`** - Karel turns right to face East.

**After the first call**:
- Position: Row 2, Column 2
- Facing: East

### Second Call to `stairStep()`

1. **Starting position**: Row 2, Column 2, Facing East.
2. **`move();`** - Karel moves to Row 2, Column 3, still facing East.
3. **`turnLeft();`** - Karel turns left to face North.
4. **`move();`** - Karel moves to Row 3, Column 3, now facing North.
5. **`turnRight();`** - Karel turns right to face East.

**After the second call**:
- Position: Row 3, Column 3
- Facing: East

### Conclusion

After calling the `stairStep` function twice, Karel will be at **Row 3, Column 3**, facing **East**.

The correct answer is:
**Row 3, Column 3, Facing East**.