Step by Step solution about How to resolve the algorithm The Twelve Days of Christmas step by step in the Go programming language

This Go program is an implementation of the popular Christmas carol "The Twelve Days of Christmas."

• It defines two string arrays, days and gifts, containing the names of the days and gifts mentioned in the carol, respectively.

• In the main function, it uses a loop to iterate over the days of Christmas (from 1 to 12).

• For each day, it prints a header indicating the day and then uses another loop to print out the gifts received on that day, starting with the gift for the current day and going back to the first gift.

• The output of the program recreates the lyrics of the carol, listing all the gifts received on each day.

Here's a breakdown of the code:

• Package Declaration: The package main declaration indicates that this is the main program file.

• Import Statement: The program imports the fmt package for input/output operations.

• String Arrays:

  • days: An array of strings containing the names of the 12 days of Christmas.
  • gifts: An array of strings containing the names of the gifts received on each day.

• main Function:

  • The main function is the entry point of the program.

• Loop Over Days: The program uses a for loop to iterate over the 12 days of Christmas.

• Print Day Header: For each day, it prints a header indicating the day of Christmas.

• Loop Over Gifts: It uses a nested for loop to iterate over the gifts received on the current day, starting with the gift for that day and going back to the first gift.

• Print Gift: For each gift, it prints the corresponding gift from the gifts array.

• Newline: After printing all the gifts for a day, it prints a newline to separate the days.

• Example Output: Running the program will produce the following output, which recreates the lyrics of the carol:

On the first day of Christmas,
My true love sent to me:
A Partridge in a Pear Tree

On the second day of Christmas,
My true love sent to me:
Two Turtle Doves and
A Partridge in a Pear Tree

On the third day of Christmas,
My true love sent to me:
Three French Hens
Two Turtle Doves and
A Partridge in a Pear Tree

...

package main

import (
	"fmt"
)

func main() {
	days := []string{"first", "second", "third", "fourth", "fifth", "sixth",
		"seventh", "eighth", "ninth", "tenth", "eleventh", "twelfth"}

	gifts := []string{"A Partridge in a Pear Tree", "Two Turtle Doves and", "Three French Hens",
		"Four Calling Birds", "Five Gold Rings", "Six Geese a-Laying",
		"Seven Swans a-Swimming", "Eight Maids a-Milking", "Nine Ladies Dancing",
		"Ten Lords a-Leaping", "Eleven Pipers Piping", "Twelve Drummers Drumming"}

	for i := 0; i < 12; i++ {
		fmt.Printf("On the %s day of Christmas,\n", days[i])
		fmt.Println("My true love sent to me:")

		for j := i; j >= 0; j-- {
			fmt.Println(gifts[j])
		}
		fmt.Println()
	}
}