To determine which Python code snippet correctly swaps the values of two variables `a` and `b`, let’s analyze the given options.

### Breakdown of the Options
1. **Option 1**:
```python
a = b
b = a
```
- This does not swap the values; instead, it assigns `b` to `a`, and then `a` to `b`, which means both `a` and `b` end up with the same value as `b`.

2. **Option 2**:
```python
temp = a
a = b
b = temp
```
- This is a classic method to swap values. Here, we store the value of `a` in a temporary variable `temp`, assign `b` to `a`, and then assign `temp` (which holds the original value of `a`) to `b`. This correctly swaps the values.

3. **Option 3**:
```python
a, b = b, a
```
- This is Python's tuple unpacking feature. It effectively swaps `a` and `b` in one line, making it another correct method to swap these variables.

4. **Option 4**:
```python
swap(a, b)
```
- This is not a recognized syntax for swapping values in Python unless `swap` is a defined function. Therefore, it will raise a `NameError` unless the function is implemented correctly elsewhere.

### Analysis and Conclusion
Based on the analysis of each option, **Option 2** and **Option 3** are correct ways to swap the values of `a` and `b` in Python:

- Option 2 utilizes a temporary variable for swapping.
- Option 3 uses Python's tuple unpacking for a clean and concise swap.

### Final Answer
The following snippets correctly swap the values of `a` and `b`:
- ```python
temp = a
a = b
b = temp
```
- ```python
a, b = b, a
```

Question

To determine which Python code snippet correctly swaps the values of two variables `a` and `b`, let’s analyze the given options.

### Breakdown of the Options
1. **Option 1**: 
   ```python
   a = b
   b = a
   ```
   - This does not swap the values; instead, it assigns `b` to `a`, and then `a` to `b`, which means both `a` and `b` end up with the same value as `b`.

2. **Option 2**: 
   ```python
   temp = a
   a = b
   b = temp
   ```
   - This is a classic method to swap values. Here, we store the value of `a` in a temporary variable `temp`, assign `b` to `a`, and then assign `temp` (which holds the original value of `a`) to `b`. This correctly swaps the values.

3. **Option 3**: 
   ```python
   a, b = b, a
   ```
   - This is Python's tuple unpacking feature. It effectively swaps `a` and `b` in one line, making it another correct method to swap these variables.

4. **Option 4**: 
   ```python
   swap(a, b)
   ```
   - This is not a recognized syntax for swapping values in Python unless `swap` is a defined function. Therefore, it will raise a `NameError` unless the function is implemented correctly elsewhere.

### Analysis and Conclusion
Based on the analysis of each option, **Option 2** and **Option 3** are correct ways to swap the values of `a` and `b` in Python:

- Option 2 utilizes a temporary variable for swapping.
- Option 3 uses Python's tuple unpacking for a clean and concise swap.

### Final Answer
The following snippets correctly swap the values of `a` and `b`:
- ```python
  temp = a
  a = b
  b = temp
  ```
- ```python
  a, b = b, a
  ```

Knowee AI · Accepted Answer