请问一下大佬们，Go语言中的iota除了在const内部做行索引计数和定义数量级外，还有什么实用性嘛？
package main
type ByteSize float64
//定义数量级
const (
_ = iota //用下划线忽略第一个变量,此时iota=0
KB ByteSize = 1 << (10*iota) //1 << (10*1),此时iota=1
MB //1 << (10*2),此时iota=2
GB //1 << (10*3),此时iota=3
TB //1 << (10*4),此时iota=4
PB //1 << (10*5),此时iota=5
EB //1 << (10*6),此时iota=6
ZB //1 << (10*7),此时iota=7
YB //1 << (10*8),此时iota=8
)
func main() {
println("KB =", KB)
println("MB =", MB)
println("GB =", GB)
println("TB =", TB)
println("PB =", PB)
println("EB =", EB)
println("ZB =", ZB)
println("YB =", YB)
}