What tools do you use to identify and fix errors in code?

To identify and fix errors in Go, I use several approaches:

• Logging: I add log outputs using the log package to track the program's state.
• Error handling: I always check the returned errors and handle them correctly.
• Delve Debugger: I use Delve (dlv) for step-by-step execution of code, viewing variable values, and call stacks.
• Testing: I write unit tests using the testing package to detect errors early.

Example of error checking:

file, err := os.Open("file.txt")
if err != nil {
    log.Fatalf("Error opening file: %v", err)
}
// work with the file

This approach helps quickly locate and fix errors.