Calculate Primes in Go

sieve_of_eratosthenes.go

package main

import (
	"fmt"
)

func main() {
	fmt.Println(Primes(200))
}

func Primes(size int) []int {
	arr := make([]int, size+1)

	for i := 2; i < size+1; i++ {
		arr[i] = i
	}

	for i := 0; i < len(arr)/2+1; i++ {
		if arr[i] != 0 {
			twoTimesMult := 2 * i
			for twoTimesMult <= size {
				arr[twoTimesMult] = 0
				twoTimesMult += i
			}
		}
	}
	
	var result []int
	
	for _, n := range arr {
		if n != 0 {
        		result = append(result, n)
    		}
	}

	return result
}