131 lines
2.9 KiB
Go
131 lines
2.9 KiB
Go
// Copyright © 2018 Inanc Gumus
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// Learn Go Programming Course
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// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
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//
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// For more tutorials : https://learngoprogramming.com
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// In-person training : https://www.linkedin.com/in/inancgumus/
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// Follow me on twitter: https://twitter.com/inancgumus
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package main
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import (
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"fmt"
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"strings"
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)
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func main() {
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var (
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names [3]string // The names of your best three friends
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distances [5]int // The distances to five different locations
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data [5]byte // A data buffer with five bytes of capacity
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ratios [1]float64 // Currency exchange ratios only for a single currency
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alives [4]bool // Up/Down status of four different web servers
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zero [0]byte // A byte array that doesn't occupy memory space
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)
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names[0] = "Einstein"
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names[1] = "Tesla"
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names[2] = "Shepard"
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distances[0] = 50
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distances[1] = 40
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distances[2] = 75
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distances[3] = 30
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distances[4] = 125
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data[0] = 'H'
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data[1] = 'E'
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data[2] = 'L'
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data[3] = 'L'
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data[4] = 'O'
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ratios[0] = 3.14145
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alives[0] = true
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alives[1] = false
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alives[2] = true
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alives[3] = false
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// zero[0] = "BOMB!"
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_ = zero
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// =========================================================================
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separator := "\n" + strings.Repeat("=", 20) + "\n"
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fmt.Print("names", separator)
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for i := 0; i < len(names); i++ {
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fmt.Printf("names[%d]: %q\n", i, names[i])
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}
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fmt.Print("\ndistances", separator)
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for i := 0; i < len(distances); i++ {
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fmt.Printf("distances[%d]: %d\n", i, distances[i])
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}
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fmt.Print("\ndata", separator)
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for i := 0; i < len(data); i++ {
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// try the %c verb
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fmt.Printf("data[%d]: %d\n", i, data[i])
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}
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fmt.Print("\nratios", separator)
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for i := 0; i < len(ratios); i++ {
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fmt.Printf("ratios[%d]: %.2f\n", i, ratios[i])
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}
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fmt.Print("\nalives", separator)
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for i := 0; i < len(alives); i++ {
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fmt.Printf("alives[%d]: %t\n", i, alives[i])
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}
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// no loop for zero elements
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fmt.Print("\nzero", separator)
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for i := 0; i < len(zero); i++ {
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fmt.Printf("zero[%d]: %d\n", i, zero[i])
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}
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// =========================================================================
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// you know how this works :) don't be freaked out!
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fmt.Printf(`
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%s
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FOR RANGES
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%[1]s
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`, strings.Repeat("~", 30))
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fmt.Print("names", separator)
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for i, v := range names {
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fmt.Printf("names[%d]: %q\n", i, v)
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}
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fmt.Print("\ndistances", separator)
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for i, v := range distances {
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fmt.Printf("distances[%d]: %d\n", i, v)
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}
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fmt.Print("\ndata", separator)
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for i, v := range data {
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// try the %c verb
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fmt.Printf("data[%d]: %d\n", i, v)
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}
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fmt.Print("\nratios", separator)
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for i, v := range ratios {
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fmt.Printf("ratios[%d]: %.2f\n", i, v)
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}
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fmt.Print("\nalives", separator)
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for i, v := range alives {
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fmt.Printf("alives[%d]: %t\n", i, v)
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}
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// no loop for zero elements
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fmt.Print("\nzero", separator)
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for i, v := range zero {
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fmt.Printf("zero[%d]: %d\n", i, v)
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}
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}
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