Go 숫자 상수

1 개요

Numeric Constants

Go 숫자 상수

// https://gobyexample.com/constants
package main
import "fmt"
import "math"

const s string = "constant" // 전역 상수
func main() {
    fmt.Println(s)
    const n = 500000000
    const d = 3e20 / n
    fmt.Println(d)
    fmt.Println(int64(d))
    fmt.Println(math.Sin(n))
}

package main

import "fmt"

const (
	// Create a huge number by shifting a 1 bit left 100 places.
	// In other words, the binary number that is 1 followed by 100 zeroes.
	Big = 1 << 100
	// Shift it right again 99 places, so we end up with 1<<1, or 2.
	Small = Big >> 99
)

func needInt(x int) int { return x*10 + 1 }
func needFloat(x float64) float64 {
	return x * 0.1
}

func main() {
	fmt.Println(needInt(Small))
	fmt.Println(needFloat(Small))
	fmt.Println(needFloat(Big))
}

2 같이 보기

• Go 상수

3 참고

• https://tour.golang.org/basics/16