Data commit

Task/Happy-numbers/Elena/happy-numbers.elena

@@ -0,0 +1,44 @@
+import extensions;
+import system'collections;
+import system'routines;
+
+isHappy(int n)
+{
+    auto cache := new List<int>(5);
+    int sum := 0;
+    int num := n;
+    while (num != 1)
+    {
+        if (cache.indexOfElement:num != -1)
+        {
+            ^ false
+        };
+        cache.append(num);
+        while (num != 0)
+        {
+            int digit := num.mod:10;
+            sum += (digit*digit);
+            num /= 10
+        };
+        num := sum;
+        sum := 0
+    };
+
+    ^ true
+}
+
+public program()
+{
+    auto happynums  := new List<int>(8);
+    int num := 1;
+    while (happynums.Length < 8)
+    {
+        if (isHappy(num))
+        {
+            happynums.append(num)
+        };
+
+        num += 1
+    };
+    console.printLine("First 8 happy numbers: ", happynums.asEnumerable())
+}