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import io
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import log
main() {
n := 100
i := 2
loop {
if i > n {
return
}
if isPrime(i) == 1 {
if i != 2 {
io.out(" ")
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}
log.number(i)
}
i += 1
}
}
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isPrime(x Int) -> Int {
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if x == 2 {
return 1
}
if x % 2 == 0 {
return 0
}
i := 3
loop {
if i * i > x {
return 1
}
if x % i == 0 {
return 0
}
i += 2
}
}