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62 lines
1.0 KiB
Markdown
62 lines
1.0 KiB
Markdown
---
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id: 681cb1b0dab50c87ddb2e519
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title: "Challenge 8: Factorializer"
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challengeType: 29
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dashedName: challenge-8
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---
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# --description--
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Given an integer from zero to 20, return the factorial of that number. The factorial of a number is the product of all the numbers between 1 and the given number.
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- The factorial of zero is 1.
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# --hints--
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`factorial(0)` should return `1`.
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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(factorial(0), 1)`)
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}})
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```
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`factorial(5)` should return `120`.
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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(factorial(5), 120)`)
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}})
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```
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`factorial(20)` should return `2432902008176640000`.
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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(factorial(20), 2432902008176640000)`)
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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 factorial(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 factorial(n):
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result = 1
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for i in range(1, n + 1):
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result *= i
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return result
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```
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