Arggh Golang does not include a round function in the standard math package. So I wrote a quick one.

round.go

package main

import (
	"log"
	"math"
)

func Round(val float64, roundOn float64, places int ) (newVal float64) {
	var round float64
	pow := math.Pow(10, float64(places))
	digit := pow * val
	_, div := math.Modf(digit)
	if div >= roundOn {
		round = math.Ceil(digit)
	} else {
		round = math.Floor(digit)
	}
	newVal = round / pow
	return
}

func main() {
	log.Println(Round(123.555555, .5, 3))
	log.Println(Round(123.558, .5, 2))
}

https://www.carlyzach.com/functions/playground/10308388

2018! -> https://golang.org/pkg/math/#Round