Go言語 定数

package main

import "fmt"

func main() {
    price := 150
    //rate := 1.1
    const rate = 1.1
    fmt.Println(float64(price) * float64(120) * rate)
    fmt.Println(float64(price) * float64(130) * rate)
    fmt.Println(float64(price) * float64(140) * rate)

    price++
    //rate = 1.08
    fmt.Println(float64(price) * float64(120) * rate)
    fmt.Println(float64(price) * float64(130) * rate)
    fmt.Println(float64(price) * float64(140) * rate)
}