Refactored solution 412 using string concatenation

Author: brenobaptista

leetcode/0412.Fizz-Buzz/412. Fizz Buzz.go

@@ -3,20 +3,23 @@ package leetcode
 import "strconv"
 
 func fizzBuzz(n int) []string {
-	if n < 0 {
-		return []string{}
-	}
 	solution := make([]string, n)
+
 	for i := 1; i <= n; i++ {
-		if i%3 == 0 && i%5 == 0 {
-			solution[i-1] = "FizzBuzz"
-		} else if i%3 == 0 {
-			solution[i-1] = "Fizz"
-		} else if i%5 == 0 {
-			solution[i-1] = "Buzz"
-		} else {
+		solution[i-1] = ""
+
+		if i%3 == 0 {
+			solution[i-1] += "Fizz"
+		}
+
+		if i%5 == 0 {
+			solution[i-1] += "Buzz"
+		}
+
+		if solution[i-1] == "" {
 			solution[i-1] = strconv.Itoa(i)
 		}
 	}
+
 	return solution
 }