What are the advantages and disadvantages of the built-in logging class in standard libraries?

The built-in logging class in Go's standard libraries (package log) has the following advantages and disadvantages:

Advantages:

• Ease of use: minimal set of functions for quick logging.
• Built-in: does not require third-party packages.
• Suitable for basic tasks and small projects.
• Allows easy output of logs to standard output or to a file.

Disadvantages:

• Limited functionality: no logging levels (info, warn, error) by default.
• Lack of flexible output format configuration.
• No support for structured logs (e.g., JSON).
• Difficult to integrate with centralized logging systems.

Example of usage:

package main

import (
    "log"
    "os"
)

func main() {
    // Logging to a file
    f, err := os.OpenFile("app.log", os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644)
    if err != nil {
        log.Fatal(err)
    }
    defer f.Close()

    log.SetOutput(f)
    log.Println("Application started")
}