How can a logging system be integrated into software?

To integrate a logging system into Go software, you can use the standard log package or third-party libraries such as logrus or zap.

Main steps:

1. Choose a logging library.
2. Configure the output format (e.g., JSON, text).
3. Define log levels (info, warning, error).
4. Call logging functions at the appropriate places in the code.

Example using the standard log package:

package main

import (
    "log"
    "os"
)

func main() {
    // Logging to a file
    file, err := os.OpenFile("app.log", os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0666)
    if err != nil {
        log.Fatal(err)
    }
    defer file.Close()

    log.SetOutput(file)

    log.Println("Application started")
    log.Println("An error occurred while processing the request")
}

This approach allows logs to be saved to a file for later analysis.