completed average function

averageWithArgs/averageWithArgs.go

@@ -2,9 +2,21 @@ package main
 
 import (
 	"fmt"
+	"log"
 	"os"
+	"strconv"
 )
 
-func average2() {
-	fmt.Println(os.Args)
+func main() {
+	arguments := os.Args[1:]
+	var sum float64 = 0
+	for _, argument := range arguments {
+		number, err := strconv.ParseFloat(argument, 64)
+		if err != nil {
+			log.Fatal(err)
+		}
+		sum += number
+	}
+	sampleCount := float64(len(arguments))
+	fmt.Printf("Average: %0.2f\n", sum/sampleCount)
 }