Data commit

Task/Loops-Increment-loop-index-within-loop-body/Scala/loops-increment-loop-index-within-loop-body.scala

@@ -0,0 +1,21 @@
+import scala.annotation.tailrec
+
+object LoopIncrementWithinBody extends App {
+  private val (limit, offset) = (42L, 1)
+
+  @tailrec
+  private def loop(i: Long, n: Int): Unit = {
+
+    def isPrime(n: Long) =
+      n > 1 && ((n & 1) != 0 || n == 2) && (n % 3 != 0 || n == 3) &&
+        ((5 to math.sqrt(n).toInt by 2).par forall (n % _ != 0))
+
+    if (n < limit + offset)
+      if (isPrime(i)) {
+        printf("n = %-2d  %,19d%n".formatLocal(java.util.Locale.GERMANY, n, i))
+        loop(i + i + 1, n + 1)
+      } else loop(i + 1, n)
+  }
+
+  loop(limit, offset)
+}