Sort primes from list to a list

Sort primes from list to a list is a draft programming task. It is not yet considered ready to be promoted as a complete task, for reasons that should be found in its talk page.

Task

Let given list:
Primes = [2,43,81,122,63,13,7,95,103] <
Show on this page the ascending ordered list of primes from given list.

Ring

<lang ring> load "stdlibcore.ring" ? "working"

Primes = [2,43,81,122,63,13,7,95,103] Temp = []

for n = 1 to len(Primes)

    if isprime(Primes[n])
       add(Temp,Primes[n])
    ok

next

Temp = sort(Temp) ? Temp ? "done..." </lang>

Output:

working
Primes are:
2
7
13
43
103
done...