Function Problem16

project_euler/problem_16/problem16.go:17–33

(exponent int64)

)

func Problem16(exponent int64) int64 {
	var result big.Int

	bigTwo := big.NewInt(2)
	bigExponent := big.NewInt(exponent)

	result.Exp(bigTwo, bigExponent, nil)

	resultStr := result.String()

	var sum int64
	for _, digit := range resultStr {
		sum += int64(digit - '0')
	}

	return sum
}