And the average value obtained with an array of (Golang Programming classic case) with the Go language

Case : obtaining an array and the average, as follows:

package main

import (
	"fmt"
)

func main() {
	var intArr  = [...]int{3, -4, 9, 8, 12, 7}
	sum := 0
	for _, val := range intArr {
		//累计求和
		sum += val
	}
	//平均值保留到2位小数
	fmt.Printf("sum=%v 平均值=%.3v \n",sum, float64(sum)/float64(len(intArr)))
}

Execution results as shown below: