123 lines
2.7 KiB
Go
123 lines
2.7 KiB
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"
|
|
"strings"
|
|
)
|
|
|
|
func main() {
|
|
// The names of your three best friends
|
|
names := [3]string{
|
|
"Einstein",
|
|
"Tesla",
|
|
"Shepard",
|
|
}
|
|
|
|
// The distances to five different locations
|
|
distances := [5]int{50, 40, 75, 30, 125}
|
|
|
|
// A data buffer with five bytes of capacity
|
|
data := [5]byte{'H', 'E', 'L', 'L', 'O'}
|
|
|
|
// Currency exchange ratios only for a single currency
|
|
ratios := [1]float64{3.14145}
|
|
|
|
// Up/Down status of four different web servers
|
|
alives := [4]bool{true, false, true, false}
|
|
|
|
// A byte array that doesn't occupy memory space
|
|
//
|
|
// Don't do this:
|
|
// zero := [0]byte{}
|
|
//
|
|
// Do this (when you don't assign elements):
|
|
var zero [0]byte
|
|
|
|
// =========================================================================
|
|
|
|
separator := "\n" + strings.Repeat("=", 20) + "\n"
|
|
|
|
fmt.Print("names", separator)
|
|
for i := 0; i < len(names); i++ {
|
|
fmt.Printf("names[%d]: %q\n", i, names[i])
|
|
}
|
|
|
|
fmt.Print("\ndistances", separator)
|
|
for i := 0; i < len(distances); i++ {
|
|
fmt.Printf("distances[%d]: %d\n", i, distances[i])
|
|
}
|
|
|
|
fmt.Print("\ndata", separator)
|
|
for i := 0; i < len(data); i++ {
|
|
// try the %c verb
|
|
fmt.Printf("data[%d]: %d\n", i, data[i])
|
|
}
|
|
|
|
fmt.Print("\nratios", separator)
|
|
for i := 0; i < len(ratios); i++ {
|
|
fmt.Printf("ratios[%d]: %.2f\n", i, ratios[i])
|
|
}
|
|
|
|
fmt.Print("\nalives", separator)
|
|
for i := 0; i < len(alives); i++ {
|
|
fmt.Printf("alives[%d]: %t\n", i, alives[i])
|
|
}
|
|
|
|
// no loop for zero elements
|
|
fmt.Print("\nzero", separator)
|
|
for i := 0; i < len(zero); i++ {
|
|
fmt.Printf("zero[%d]: %d\n", i, zero[i])
|
|
}
|
|
|
|
// =========================================================================
|
|
|
|
// you know how this works :) don't be freaked out!
|
|
fmt.Printf(`
|
|
|
|
%s
|
|
FOR RANGES
|
|
%[1]s
|
|
|
|
`, strings.Repeat("~", 30))
|
|
|
|
fmt.Print("names", separator)
|
|
for i, v := range names {
|
|
fmt.Printf("names[%d]: %q\n", i, v)
|
|
}
|
|
|
|
fmt.Print("\ndistances", separator)
|
|
for i, v := range distances {
|
|
fmt.Printf("distances[%d]: %d\n", i, v)
|
|
}
|
|
|
|
fmt.Print("\ndata", separator)
|
|
for i, v := range data {
|
|
// try the %c verb
|
|
fmt.Printf("data[%d]: %d\n", i, v)
|
|
}
|
|
|
|
fmt.Print("\nratios", separator)
|
|
for i, v := range ratios {
|
|
fmt.Printf("ratios[%d]: %.2f\n", i, v)
|
|
}
|
|
|
|
fmt.Print("\nalives", separator)
|
|
for i, v := range alives {
|
|
fmt.Printf("alives[%d]: %t\n", i, v)
|
|
}
|
|
|
|
// no loop for zero elements
|
|
fmt.Print("\nzero", separator)
|
|
for i, v := range zero {
|
|
fmt.Printf("zero[%d]: %d\n", i, v)
|
|
}
|
|
}
|