fizzbuzz.go

package fizzbuzz

import (
	"strconv"
	"strings"
)

// FizzBuzz return "Fizz" for 3*n number, "Buzz" for 5*n number,
// "FizzBuzz" for 15*n number and number as string otherwise.
func FizzBuzz(n int) string {
	res := strings.Builder{}
	if n%3 == 0 {
		res.WriteString("Fizz")
	}
	if n%5 == 0 {
		res.WriteString("Buzz")
	}
	if res.Len() == 0 {
		res.WriteString(strconv.Itoa(n))
	}

	return res.String()
}