Added prime numbers example

examples/prime/prime.q

@@ -0,0 +1,47 @@
+import log
+import sys
+
+main() {
+	n := 100
+	i := 2
+
+	loop {
+		if i > n {
+			return
+		}
+
+		if isPrime(i) == 1 {
+			if i != 2 {
+				sys.write(1, " ", 1)
+			}
+
+			log.number(i)
+		}
+
+		i += 1
+	}
+}
+
+isPrime(x) {
+	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
+	}
+}