58 lines
1.4 KiB
Go
58 lines
1.4 KiB
Go
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// For more tutorials: https://blog.learngoprogramming.com
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//
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// 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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package main
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import "fmt"
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func main() {
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str := "hey"
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bytes := []byte{104, 101, 121}
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// same as: []byte("hey")
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fmt.Printf(`"hey" as bytes : %d`+"\n", []byte(str))
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// same as: string([]byte{104, 101, 121})
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fmt.Printf("bytes as string : %q\n", string(bytes))
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// runes are unicode codepoints (numbers)
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fmt.Println()
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fmt.Printf("%c : %[1]d\n", 'h')
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fmt.Printf("%c : %[1]d\n", 'e')
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fmt.Printf("%c : %[1]d\n", 'y')
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// a rune literal is typeless
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// you can put it in any numeric type
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var (
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anInt int = 'h'
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anInt8 int8 = 'h'
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anInt16 int16 = 'h'
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anInt32 int32 = 'h'
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// rune literal's default type is: rune
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// so, you don't need to specify it.
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// aRune rune = 'h'
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aRune = 'h'
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// and so on...
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)
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fmt.Println()
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fmt.Printf("rune literals are typeless:\n\t%T %T %T %T %T\n",
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anInt, anInt8, anInt16, anInt32, aRune)
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fmt.Println()
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// all are the same rune
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// beginning with go 1.13 you can type: 0b0110_1000 instead
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// fmt.Printf("%q as binary: %08[1]b\n", 0b0110_1000)
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fmt.Printf("%q in decimal: %[1]d\n", 104)
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fmt.Printf("%q in binary : %08[1]b\n", 'h')
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fmt.Printf("%q in hex : 0x%[1]x\n", 0x68)
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}
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