A-M baby

Task/Happy-numbers/Go/happy-numbers.go

@@ -0,0 +1,33 @@
+package main
+
+import (
+    "fmt"
+    "strconv"
+)
+
+func happy(n int) bool {
+    m := make(map[int]int)
+    for n > 1 {
+        m[n] = 0
+        s := strconv.Itoa(n)
+        n = 0
+        for _, d := range s {
+            x := int(d) - '0'
+            n += x * x
+        }
+        if _, ok := m[n]; ok {
+            return false
+        }
+    }
+    return true
+}
+
+func main() {
+    for found, n := 0, 1; found < 8; n++ {
+        if happy(n) {
+            fmt.Print(n, " ")
+            found++
+        }
+    }
+    fmt.Println("")
+}