msintangible/devopsprojectms

As a developer, I want the calculator to handle invalid input and edge cases so that it behaves safely and predictably.

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#26 opened on Dec 28, 2025

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enhancementgood first issuehelp wanted

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Description

Add validation and error handling for invalid inputs and edge cases such as division by zero to prevent runtime errors and incorrect results.

DoD:

Invalid inputs are handled gracefully

Division by zero is prevented and handled correctly

No application crashes occur due to invalid input

Behaviour is manually verified

Contributor guide

Research direction
Review the existing calculator implementation to locate where inputs are processed and where division by zero could occur. Then add input validation and exception handling to gracefully handle these cases without crashing the application. Ensure manual testing for the defined DoD.
Tech stack
java
Domain
backend
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
JavaGit
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
75