Implement _check

[ElyasShamal]

Delete me and write your Pull Request message here!

[dantharejabot]

Yay, a pull request!

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Thank you for the submission, @ElyasShamal! I'll review your code shortly, hang tight.

[dantharejabot]

This is a great attempt, @ElyasShamal!

I would like to request a few changes before merging your work. Please review my comments below and make the appropriate changes to your code.

After you update your code locally, follow the instructions to save your changes locally and push your changes to your fork.

When you push your changes to your fork, I'll come back for another review.

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Your code style completely follows the style guide. Nice job!

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There are 5 tests still pending. In your test file, change describe.skip to describe and ensure they pass.

⚠️ _check should throw a TypeError if arguments are not numbers
⚠️ _check should be called once in "add"
⚠️ _check should be called once in "subtract"
⚠️ _check should be called once in "multiply"
⚠️ _check should be called once in "divide"

[dantharejabot]

✨ Changes synced ✨

When a pull request is open, GitHub tracks changes to the branch it was opened from. As you push changes to your fork's master branch, you'll automatically see them here.

Thanks for the changes, @ElyasShamal. I'm reviewing them now.

[ElyasShamal]

all tests pass successfully.