base2.go

base2.go

package main

import (
	"fmt"
	"math"
)

func keta(n int) int {
	keta := 0

	for n > 0 {
		n /= 10
		keta++
	}

	return keta

}

func main() {
	k := 1011
	ans := 0.0
	keta := keta(k)

	for i := 0; i < keta; i++ {
		val := k % 10
		ans += math.Pow(2, float64(i)) * float64(val)
		k /= 10
	}

	fmt.Println("ans", ans)
}