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76 lines
1.3 KiB
Markdown
76 lines
1.3 KiB
Markdown
---
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id: 681cb1b0dab50c87ddb2e51a
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title: "Challenge 9: Sum of Squares"
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challengeType: 29
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dashedName: challenge-9
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---
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# --description--
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Given a positive integer up to 1,000, return the sum of all the integers squared from 1 up to the number.
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# --hints--
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`sum_of_squares(5)` should return `55`.
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```js
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({test: () => { runPython(`
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from unittest import TestCase
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TestCase().assertEqual(sum_of_squares(5), 55)`)
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}})
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```
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`sum_of_squares(10)` should return `385`.
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```js
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({test: () => { runPython(`
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from unittest import TestCase
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TestCase().assertEqual(sum_of_squares(10), 385)`)
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}})
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```
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`sum_of_squares(25)` should return `5525`.
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```js
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({test: () => { runPython(`
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from unittest import TestCase
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TestCase().assertEqual(sum_of_squares(25), 5525)`)
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}})
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```
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`sum_of_squares(500)` should return `41791750`.
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```js
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({test: () => { runPython(`
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from unittest import TestCase
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TestCase().assertEqual(sum_of_squares(500), 41791750)`)
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}})
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```
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`sum_of_squares(1000)` should return `333833500`.
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```js
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({test: () => { runPython(`
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from unittest import TestCase
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TestCase().assertEqual(sum_of_squares(1000), 333833500)`)
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}})
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```
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# --seed--
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## --seed-contents--
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```py
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def sum_of_squares(n):
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return n
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```
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# --solutions--
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```py
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def sum_of_squares(n):
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sum = ((n)*(n+1)*(2*n+1))//6
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return sum
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```
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