Base 7

base7.go

func convertToBase7(num int) string {
    if num == 0 {
        return  "0"
    }
    var positive bool 
    var result string
    if num < 0 {
        num = -num 
        positive  = true
    }
    for num  !=0 {
        result =   strconv.Itoa(num%7) + result
        num /= 7
    }
    if positive {
        result = "-" + result
    }
    return result
}


//----------------------------
func convertToBase7(num int) string {
    if num == 0 {
        return "0"
    }
    var neg bool
    if num < 0 {
        neg = true
        num *= -1
    }
    res := ""
    for ; num != 0; num /= 7 {
        res = strconv.Itoa(num%7) + res
    }
    if neg {
        res = "-" + res
    }
    return res
}
//----------------------
func convertToBase7(num int) string {
    if num == 0 {
        return "0"
    }
    var res, sign string
    if num<0 {
        sign = "-"
        num=-num
    }
    for ;num>0; num/=7 {
        res = string((byte(num%7)+'0'))+res
    }
    return sign+res
}