// scriptol.org
// sieve or eratosthenes in scriptol

void eratosthenes(int n)

    int [] all = {}         

    echo 1, " ", 2

    int i = 3 
    while i <= n
        if  i not in all:
            echo " ", i
            int j = i
            while j <= (n / i)
                all.push(i * j)
            let j + 1
		/if	
	let  i + 2                        
    print
return	

eratosthenes(50)