go running average

running_average.go

package main

import (
	"fmt"
	"math/rand"
)

func main() {
	src := []float64{}
	for i := 0; i < 100; i++ {
		src = append(src, rand.Float64()*1000)
	}
	fmt.Println(src)

	var avg1 float64 = 0.0

	for _, v := range src {
		avg1 += v
	}
	avg1 /= float64(len(src))

	fmt.Println("Method 1 average: ", avg1)

	var avg2 float64 = 0.0
	for i, v := range src {
		avg2 = ((avg2 * float64(i)) + v) / float64(i+1)
	}

	fmt.Println("Method 2 average: ", avg2)
}