Get max decimal of binary in golang

maxBinary.go

package main

import (
	"fmt"
	"math"
)

func main() {
	binaryLength := 8
	var maxValueInDecimal float64 = 0
	var binary2decimal []float64
	for i := 0; i < binaryLength; i++ {
		binary2decimal = append(binary2decimal, math.Pow(2, float64(i)))
	}
	for _, num := range binary2decimal {
			maxValueInDecimal += num
	}
	fmt.Println(maxValueInDecimal)
	fmt.Println(binary2decimal)
}