52 lines
1.4 KiB
Go
52 lines
1.4 KiB
Go
|
// For more tutorials: https://blog.learngoprogramming.com
|
||
|
|
//
|
||
|
|
// Copyright © 2018 Inanc Gumus
|
||
|
|
// Learn Go Programming Course
|
||
|
|
// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
|
||
|
|
//
|
||
|
|
|
||
|
|
package main
|
||
|
|
|
||
|
|
import "fmt"
|
||
|
|
|
||
|
|
func main() {
|
||
|
|
var (
|
||
|
|
planet = "venus"
|
||
|
|
distance = 261
|
||
|
|
orbital = 224.701
|
||
|
|
hasLife = false
|
||
|
|
)
|
||
|
|
|
||
|
|
// swiss army knife %v verb
|
||
|
|
fmt.Printf("Planet: %v\n", planet)
|
||
|
|
fmt.Printf("Distance: %v millions kms\n", distance)
|
||
|
|
fmt.Printf("Orbital Period: %v days\n", orbital)
|
||
|
|
fmt.Printf("Does %v have life? %v\n", planet, hasLife)
|
||
|
|
|
||
|
|
// argument indexing - indexes start from 1
|
||
|
|
fmt.Printf(
|
||
|
|
"%v is %v away. Think! %[2]v kms! %[1]v OMG.\n",
|
||
|
|
planet, distance,
|
||
|
|
)
|
||
|
|
|
||
|
|
// why use other verbs than? because: type-safety
|
||
|
|
// uncomment to see the warnings:
|
||
|
|
//
|
||
|
|
// fmt.Printf("Planet: %d\n", planet)
|
||
|
|
// fmt.Printf("Distance: %s millions kms\n", distance)
|
||
|
|
// fmt.Printf("Orbital Period: %t days\n", orbital)
|
||
|
|
// fmt.Printf("Does %v has life? %f\n", planet, hasLife)
|
||
|
|
|
||
|
|
// correct verbs:
|
||
|
|
// fmt.Printf("Planet: %s\n", planet)
|
||
|
|
// fmt.Printf("Distance: %d millions kms\n", distance)
|
||
|
|
// fmt.Printf("Orbital Period: %f days\n", orbital)
|
||
|
|
// fmt.Printf("Does %s has life? %t\n", planet, hasLife)
|
||
|
|
|
||
|
|
// precision
|
||
|
|
fmt.Printf("Orbital Period: %f days\n", orbital)
|
||
|
|
fmt.Printf("Orbital Period: %.0f days\n", orbital)
|
||
|
|
fmt.Printf("Orbital Period: %.1f days\n", orbital)
|
||
|
|
fmt.Printf("Orbital Period: %.2f days\n", orbital)
|
||
|
|
}
|