Merge pull request youngyangyang04#300 from betNevS/master

添加 0202.快乐数 go版

problems/0202.快乐数.md

@@ -111,6 +111,24 @@ Python：
 
 
 Go：
+```go
+func isHappy(n int) bool {
+    m := make(map[int]bool)
+    for n != 1 && !m[n] {
+        n, m[n] = getSum(n), true
+    }
+    return n == 1
+}
+
+func getSum(n int) int {
+    sum := 0
+    for n > 0 {
+        sum += (n % 10) * (n % 10)
+        n = n / 10
+    }
+    return sum
+}
+```
 
 javaScript: