Pregunta
Parsons problem Drag the blocks into the dotted area in the correct order. light_color = "green" print("GO") if light_color == "green": print("SLOW") else: elif light_color == "yellow": print("STOP")
Ask by Rogers Evans. in the United States
Jan 27,2025
Solución de tutoría real
Respuesta verificada por el tutor
Responder
Arrange the code blocks in the following order:
1. `light_color = "green"`
2. `print("GO")`
3. `if light_color == "green":`
4. `print("SLOW")`
5. `elif light_color == "yellow":`
6. `print("STOP")`
This order ensures the program runs correctly and prints "GO" and "SLOW" when `light_color` is "green".
Solución
To solve the Parsons problem, we need to arrange the blocks of code in the correct order to ensure that the program runs without errors and produces the expected output based on the value of `light_color`.
Here’s the correct order of the blocks:
1. `light_color = "green"`
2. `print("GO")`
3. `if light_color == "green":`
4. `print("SLOW")`
5. `elif light_color == "yellow":`
6. `print("STOP")`
### Explanation of the Order:
1. **Set the light color**: The first line initializes the variable `light_color` with the value `"green"`.
2. **Print "GO"**: The second line prints "GO" regardless of the light color.
3. **Check the light color**: The `if` statement checks if `light_color` is `"green"`.
4. **Print "SLOW"**: If the condition is true (which it is, since `light_color` is `"green"`), it prints "SLOW".
5. **Check for yellow**: The `elif` statement checks if `light_color` is `"yellow"`. This will not execute in this case, but it is necessary to include it for proper structure.
6. **Print "STOP"**: This line will not execute in this case since `light_color` is not `"yellow"`.
### Final Code:
```python
light_color = "green"
print("GO")
if light_color == "green":
print("SLOW")
elif light_color == "yellow":
print("STOP")
```
This arrangement ensures that the program runs correctly and produces the expected output based on the value of `light_color`.
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Bonus Knowledge
To solve the Parsons problem, you need to place the blocks in a logical order that reflects the intended logic of the code. Here's the correct sequence: ```python light_color = "green" print("GO") if light_color == "green": print("SLOW") elif light_color == "yellow": print("STOP") ``` It’s important to ensure that your indentation is correct. In Python, indentation is crucial as it defines the blocks of code. Remember, if you miss a line or get the indentation wrong, Python won't interpret the code as intended, leading to errors!
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