Try-catch-finally in so many words

explain-try-catch-finally.go

package main

import (
	"errors"
	"fmt"
)

func foo() (string, error) {
	doErr := false
	beOpportunist := false

	msg := "Hello, playground"
	var err error = nil

	defer func() {
		if err != nil {
			fmt.Println("failed with " + msg)
		}
	}()

	if doErr {
		err = errors.New("ERROR_FOO")
		msg = "Baaaang!!!!"
		if beOpportunist {
			return "the Opportunist", fmt.Errorf("slipping in: %w", err)
		}
	}
	return msg, err
}

func main() {
	msg, err := foo()
	if err != nil {
		fmt.Printf("Error: %v", err)
		return
	}
	fmt.Printf(msg)
}