grocery add: Amount shouldn't be negative

[Andy123qq4]

Step: enter -1 for amount

Input:

Output:

[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]

Negative amount for groceries accepted

Negative amount for groceries is accepted

I have input -5

To check, I used list

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_{[original: nus-cs2113-AY2324S2/pe-interim#2508] [original labels: severity.Low type.FeatureFlaw]}

Their Response to the 'Original' Bug

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

Accepted.

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

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## :question: Issue severity Team chose [`severity.Low`] Originally [`severity.Medium`] - [x] I disagree **Reason for disagreement:** This is a huge problem, how can you have a negative amt and how can user do amt command in the future with the negative amt??

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