learngo/14-arrays/exercises/01-declare-empty/solution/main.go

// Copyright © 2018 Inanc Gumus
// Learn Go Programming Course
// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
//
// For more tutorials  : https://learngoprogramming.com
// In-person training  : https://www.linkedin.com/in/inancgumus/
// Follow me on twitter: https://twitter.com/inancgumus

package main

import "fmt"

func main() {
	var (
		names     [3]string  // The names of your three best friends
		distances [5]int     // The distances to five different locations
		data      [5]byte    // A data buffer with five bytes of capacity
		ratios    [1]float64 // Currency exchange ratios only for a single currency
		alives    [4]bool    // Up/Down status of four different web servers
		zero      [0]byte    // A byte array that doesn't occupy memory space
	)

	// 1. Declare and print the arrays with their types.
	fmt.Printf("names    : %#v\n", names)
	fmt.Printf("distances: %#v\n", distances)
	fmt.Printf("data     : %#v\n", data)
	fmt.Printf("ratios   : %#v\n", ratios)
	fmt.Printf("alives   : %#v\n", alives)
	fmt.Printf("zero     : %#v\n", zero)

	//  2. Print only the types of the same arrays.
	fmt.Println()
	fmt.Printf("names    : %T\n", names)
	fmt.Printf("distances: %T\n", distances)
	fmt.Printf("data     : %T\n", data)
	fmt.Printf("ratios   : %T\n", ratios)
	fmt.Printf("alives   : %T\n", alives)
	fmt.Printf("zero     : %T\n", zero)

	// 3. Print only the elements of the same arrays.
	fmt.Println()
	fmt.Printf("names    : %q\n", names)
	fmt.Printf("distances: %d\n", distances)
	fmt.Printf("data     : %d\n", data)
	fmt.Printf("ratios   : %.2f\n", ratios)
	fmt.Printf("alives   : %t\n", alives)
	fmt.Printf("zero     : %d\n", zero)
}