27 lines
755 B
Markdown
27 lines
755 B
Markdown
---
|
|
title: Sum of powers
|
|
type: snippet
|
|
language: python
|
|
tags: [math]
|
|
cover: river-flow
|
|
dateModified: 2020-11-02T19:28:35+02:00
|
|
---
|
|
|
|
Returns the sum of the powers of all the numbers from `start` to `end` (both inclusive).
|
|
|
|
- Use `range()` in combination with a list comprehension to create a list of elements in the desired range raised to the given `power`.
|
|
- Use `sum()` to add the values together.
|
|
- Omit the second argument, `power`, to use a default power of `2`.
|
|
- Omit the third argument, `start`, to use a default starting value of `1`.
|
|
|
|
```py
|
|
def sum_of_powers(end, power = 2, start = 1):
|
|
return sum([(i) ** power for i in range(start, end + 1)])
|
|
```
|
|
|
|
```py
|
|
sum_of_powers(10) # 385
|
|
sum_of_powers(10, 3) # 3025
|
|
sum_of_powers(10, 3, 5) # 2925
|
|
```
|