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mao-sz merged 1 commit into from
Apr 7, 2026
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foundations/12_calculator: Add clearer factorial explanation #644

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2 changes: 1 addition & 1 deletion foundations/12_calculator/README.md
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Expand Up @@ -7,6 +7,6 @@ The goal for this exercise is to create a calculator that does the following:
3. `sum()`: take an array of numbers and add all the numbers together
4. `multiply()`: take an array of numbers and multiply all the numbers together
5. `power()`: take two numbers (base and exponent) and return the result of raising the base to that exponent
6. `factorial()`: given a single number, find its [factorial](https://en.wikipedia.org/wiki/Factorial)
6. `factorial()`: given a single number, find its [factorial](https://www.mathsisfun.com/numbers/factorial.html)

Please fill out each function with your solution. Make sure to `return` the value so you can test it in Jest! To see the expected value, take a look at the `.spec.js` file that houses the Jest test cases.