added assignment 7 ex 2

src/Assignment7/Ex2.sc

@@ -0,0 +1,9 @@
+def intsFrom(n: Int): LazyList[Int] = {
+  n #:: intsFrom(n + 1)
+}
+
+def primeNumbers(list: LazyList[Int]): LazyList[Int] = {
+  list.head #:: primeNumbers(list.filter(n => n % list.head != 0))
+}
+val ints: LazyList[Int] = intsFrom(2)
+primeNumbers(ints).take(10).toList