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Challenge 9: Sum of Squares

curriculum/challenges/english/blocks/daily-coding-challenges-python/681cb1b0dab50c87ddb2e51a.md

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--description--

Given a positive integer up to 1,000, return the sum of all the integers squared from 1 up to the number.

--hints--

sum_of_squares(5) should return 55.

js
({test: () => { runPython(`
from unittest import TestCase
TestCase().assertEqual(sum_of_squares(5), 55)`)
}})

sum_of_squares(10) should return 385.

js
({test: () => { runPython(`
from unittest import TestCase
TestCase().assertEqual(sum_of_squares(10), 385)`)
}})

sum_of_squares(25) should return 5525.

js
({test: () => { runPython(`
from unittest import TestCase
TestCase().assertEqual(sum_of_squares(25), 5525)`)
}})

sum_of_squares(500) should return 41791750.

js
({test: () => { runPython(`
from unittest import TestCase
TestCase().assertEqual(sum_of_squares(500), 41791750)`)
}})

sum_of_squares(1000) should return 333833500.

js
({test: () => { runPython(`
from unittest import TestCase
TestCase().assertEqual(sum_of_squares(1000), 333833500)`)
}})

--seed--

--seed-contents--

py
def sum_of_squares(n):

    return n

--solutions--

py
def sum_of_squares(n):
    sum = ((n)*(n+1)*(2*n+1))//6
    return sum