53 lines
1.5 KiB
Go
53 lines
1.5 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 "fmt"
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func main() {
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var (
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planet = "venus"
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distance = 261
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orbital = 224.701
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hasLife = false
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)
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// swiss army knife %v verb
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fmt.Printf("Planet: %v\n", planet)
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fmt.Printf("Distance: %v millions kms\n", distance)
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fmt.Printf("Orbital Period: %v days\n", orbital)
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fmt.Printf("Does %v have life? %v\n", planet, hasLife)
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// argument indexing - indexes start from 1
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fmt.Printf(
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"%v is %v away. Think! %[2]v kms! %[1]v OMG.\n",
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planet, distance,
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)
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// why use other verbs than? because: type-safety
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// uncomment to see the warnings:
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//
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// fmt.Printf("Planet: %d\n", planet)
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// fmt.Printf("Distance: %s millions kms\n", distance)
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// fmt.Printf("Orbital Period: %t days\n", orbital)
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// fmt.Printf("Does %v has life? %f\n", planet, hasLife)
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// correct verbs:
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// fmt.Printf("Planet: %s\n", planet)
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// fmt.Printf("Distance: %d millions kms\n", distance)
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// fmt.Printf("Orbital Period: %f days\n", orbital)
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// fmt.Printf("Does %s has life? %t\n", planet, hasLife)
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// precision
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fmt.Printf("Orbital Period: %f days\n", orbital)
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fmt.Printf("Orbital Period: %.0f days\n", orbital)
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fmt.Printf("Orbital Period: %.1f days\n", orbital)
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fmt.Printf("Orbital Period: %.2f days\n", orbital)
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}
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