package main

import (
    "fmt"
)

func toHex(num int) string {
    if num == 0 {
        return "0"
    }
    s := "0123456789abcdef"

    ret := ""
    for num != 0 {
        index := num & 15
        ret = s[index: index+1]+ret
        num >>= 4
    }

    return  ret
}

func main() {
    fmt.Println(toHex(26))
}

image.png