First Number: 5 Second Number: 25 Difference: -20

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
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For `num_diff = Diff(5, 25)`, complete the code to print the following output when `num_diff` is printed.

First Number: 5 Second Number: 25 Difference: -20

```python
class Diff:
    def __init__(self, num1, num2):
        self.num1 = num1
        self.num2 = num2

    def __str__(self):
        XXX
```

Options for XXX:

1. `return '{}'.format(self.num1 - self.num2)`

2. `return 'First Number: {} Second Number: {}'.format(self.num1, self.num2, (self.num1 - self.num2)))`

3. `return 'First Number: {} Second Number: {} Difference: {}'.format(self.num1, self.num2, (self.num1 - self.num2)))`

4. `return('First Number: {} \nSecond Number: {} \nDifference: {}'.format(self.num1, self.num2, (self.num1 - self.num2)))`

The correct option is option 3:
```python
return 'First Number: {} Second Number: {} Difference: {}'.format(self.num1, self.num2, (self.num1 - self.num2)))
```

This will correctly format the output as: "First Number: 5 Second Number: 25 Difference: -20" when `num_diff` is printed.
Transcribed Image Text:For `num_diff = Diff(5, 25)`, complete the code to print the following output when `num_diff` is printed. First Number: 5 Second Number: 25 Difference: -20 ```python class Diff: def __init__(self, num1, num2): self.num1 = num1 self.num2 = num2 def __str__(self): XXX ``` Options for XXX: 1. `return '{}'.format(self.num1 - self.num2)` 2. `return 'First Number: {} Second Number: {}'.format(self.num1, self.num2, (self.num1 - self.num2)))` 3. `return 'First Number: {} Second Number: {} Difference: {}'.format(self.num1, self.num2, (self.num1 - self.num2)))` 4. `return('First Number: {} \nSecond Number: {} \nDifference: {}'.format(self.num1, self.num2, (self.num1 - self.num2)))` The correct option is option 3: ```python return 'First Number: {} Second Number: {} Difference: {}'.format(self.num1, self.num2, (self.num1 - self.num2))) ``` This will correctly format the output as: "First Number: 5 Second Number: 25 Difference: -20" when `num_diff` is printed.
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