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# prime number generation using co-expressions
procedure main(args)
local s, n, x
n := integer(get(args)) | 100
s := create (2 to n)
while (x := @s) do {
write(x)
s := create sieve(x, s)
}
end
procedure sieve(x, s)
local t
while t := @s do {
if t % x ~= 0 then suspend t
}
end
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