Database System Concepts
Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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## Higher Order Function: Whole Sum

### Task

Write a function `whole_sum()` that takes in an integer `n`. It defines and returns another function, which takes in an integer `k`, and returns `True` if the digits of `k` sum to `n`, and `False` otherwise. 

You may use the guidelines below, or you may suggest your own solution.

### Code Snippet

```python
def whole_sum(n):
    """
    >>> whole_sum(21)(777)
    True
    >>> whole_sum(142)(10010101010)
    False
    """
    def check(k):
        while __________:
            __________
            __________
        return __________
    return __________
```

### Explanation

The function `whole_sum()` needs to achieve the following:

1. **Parameter `n`:** An integer that represents the target sum of digits.
2. **Inner Function `check(k)`:** This function will:
   - Iterate through each digit of `k`.
   - Calculate the sum of the digits.
   - Return `True` if the sum equals `n`; otherwise, `False`.

The example usage provided illustrates the intended behavior:
- `whole_sum(21)(777)` should return `True` because the sum of the digits of 777 (7 + 7 + 7) is 21.
- `whole_sum(142)(10010101010)` should return `False` because the sum of the digits of 10010101010 does not equal 142.

Please fill in the blank lines to complete the inner function following the described logic.
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Transcribed Image Text:## Higher Order Function: Whole Sum ### Task Write a function `whole_sum()` that takes in an integer `n`. It defines and returns another function, which takes in an integer `k`, and returns `True` if the digits of `k` sum to `n`, and `False` otherwise. You may use the guidelines below, or you may suggest your own solution. ### Code Snippet ```python def whole_sum(n): """ >>> whole_sum(21)(777) True >>> whole_sum(142)(10010101010) False """ def check(k): while __________: __________ __________ return __________ return __________ ``` ### Explanation The function `whole_sum()` needs to achieve the following: 1. **Parameter `n`:** An integer that represents the target sum of digits. 2. **Inner Function `check(k)`:** This function will: - Iterate through each digit of `k`. - Calculate the sum of the digits. - Return `True` if the sum equals `n`; otherwise, `False`. The example usage provided illustrates the intended behavior: - `whole_sum(21)(777)` should return `True` because the sum of the digits of 777 (7 + 7 + 7) is 21. - `whole_sum(142)(10010101010)` should return `False` because the sum of the digits of 10010101010 does not equal 142. Please fill in the blank lines to complete the inner function following the described logic.
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