The meaning of code modifications with - and +

In code modifications, the - and + symbols are typically used to indicate changes in the code, commonly seen in diff comparisons (e.g., in version control tools like Git):

• - (minus sign): Indicates a deleted line (old code)
• + (plus sign): Indicates an added line (new code)

Example:

- console.log("Hello World"); // This line was deleted  
+ console.log("Hello GitHub"); // This line was added  

Other Common Scenarios:

1. Git Diff: When reviewing code changes, - and + highlight modifications.
2. Code Review: On platforms like GitHub/GitLab, red/green colors distinguish deletions/additions in PRs/MRs.
3. Patch Files: .patch files use - and + to mark changes.

Advanced Usage:

• @@ -x,y +a,b @@ indicates the location of changes (y lines starting from line x in the old file, b lines starting from line a in the new file).
• Three minus signs --- represent the old file, while three plus signs +++ represent the new file.

Need a more specific explanation or code example? Let me know the actual context you’re looking at.