Does not allow for 0 calorie foods

[iscyng]

App does not allow the input of 0 calorie foods which exist in the real world

Storage client says: Successfully saved recipe book.

add food, 1, 0, egg, lunch, https://nus-cs2113-ay2324s2.github.io/website/admin/tp-pe.html#pe-preparation-restrictions

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Make sure you enter an integer from 1 onwards for calories!

[nus-se-bot]

Team's Response

No details provided by team.

The 'Original' Bug

[The team marked this bug as a duplicate of the following bug]

Unable to add recipe with net zero calories

Certain food may be net zero in calories, but I'm unable to add them to the list.

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_{[original: nus-cs2113-AY2324S2/pe-interim#2491] [original labels: type.FunctionalityBug severity.VeryLow]}

Their Response to the 'Original' Bug

[This is the team's response to the above 'original' bug]

Sure, we could allow for net zero calorie meals.

Items for the Tester to Verify

:question: Issue duplicate status

Team chose to mark this issue as a duplicate of another issue (as explained in the Team's response above)

• [ ] I disagree

Reason for disagreement: [replace this with your explanation]

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## :question: Issue type Team chose [`type.FunctionalityBug`] Originally [`type.FeatureFlaw`] - [ ] I disagree **Reason for disagreement:** [replace this with your explanation]

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## :question: Issue severity Team chose [`severity.VeryLow`] Originally [`severity.Medium`] - [x] I disagree **Reason for disagreement:** 0 calorie products exist and Recipe.io does not allow users to add such recipes. I don't believe that it is simply a cosmetic problem but does pose an occasional inconvenience to users who are particular about their intake eg bodybuilders 

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