enum_planet_masses.go

// https://blog.learngoprogramming.com/golang-const-type-enums-iota-bc4befd096d3
package main

import (
	"fmt"
)

const (
    Mercury = 3.303e+23
    Venus   = 4.869e+24
    Earth   = 5.976e+24
    Mars    = 6.421e+23
    Jupiter = 1.9e+27
    Saturn  = 5.688e+26
    Uranus  = 8.686e+25
    Neptune = 1.024e+26
)

func main() {
    fmt.Println("Mercury's mass is", Mercury)
    fmt.Println("Jupiter's mass is", Jupiter)
}