Golang | Leetcode Golang题解之第405题数字转换为十六进制数

题目：

题解：

func toHex(num int) string {if num == 0 {return "0"}sb := &strings.Builder{}for i := 7; i >= 0; i-- {val := num >> (4 * i) & 0xfif val > 0 || sb.Len() > 0 {var digit byteif val < 10 {digit = '0' + byte(val)} else {digit = 'a' + byte(val-10)}sb.WriteByte(digit)}}return sb.String()
}