Golang : Ordinal and Ordinalize a given number to the English ordinal numeral

Two functions that will convert a given number to the English ordinal numeral. Can be handy in developing chat bot and also printing out proper sentences. The functions below can handle negative number as well.

Here you go!

 package main

 import (
 "fmt"
 "math"
 "strconv"
 )

 func Ordinal(num int) string {

 var ordinalDictionary = map[int]string{
 0: "th",
 1: "st",
 2: "nd",
 3: "rd",
 4: "th",
 5: "th",
 6: "th",
 7: "th",
 8: "th",
 9: "th",
 }

 // math.Abs() is to convert negative number to positive
 floatNum := math.Abs(float64(num))
 positiveNum := int(floatNum)

 if ((positiveNum % 100) >= 11) && ((positiveNum % 100) <= 13) {
 return "th"
 }

 return ordinalDictionary[positiveNum]

 }

 func Ordinalize(num int) string {

 var ordinalDictionary = map[int]string{
 0: "th",
 1: "st",
 2: "nd",
 3: "rd",
 4: "th",
 5: "th",
 6: "th",
 7: "th",
 8: "th",
 9: "th",
 }

 // math.Abs() is to convert negative number to positive
 floatNum := math.Abs(float64(num))
 positiveNum := int(floatNum)

 if ((positiveNum % 100) >= 11) && ((positiveNum % 100) <= 13) {
 return strconv.Itoa(num) + "th"
 }

 return strconv.Itoa(num) + ordinalDictionary[positiveNum]

 }

 func main() {
 // oridinaL tests
 fmt.Println("1 : ", Ordinal(1))
 fmt.Println("2 : ", Ordinal(2))
 fmt.Println("3 : ", Ordinal(3))
 fmt.Println("4 : ", Ordinal(4))
 fmt.Println("5 : ", Ordinal(5))
 fmt.Println("6 : ", Ordinal(6))
 fmt.Println("7 : ", Ordinal(7))
 fmt.Println("8 : ", Ordinal(8))
 fmt.Println("9 : ", Ordinal(9))
 fmt.Println("102 : ", Ordinal(102))
 fmt.Println("-99 : ", Ordinal(-99))
 fmt.Println("-1021 : ", Ordinal(-1021))

 // oridinaLIZE tests
 fmt.Println("1 : ", Ordinalize(1))
 fmt.Println("2 : ", Ordinalize(2))
 fmt.Println("3 : ", Ordinalize(3))
 fmt.Println("4 : ", Ordinalize(4))
 fmt.Println("5 : ", Ordinalize(5))
 fmt.Println("6 : ", Ordinalize(6))
 fmt.Println("7 : ", Ordinalize(7))
 fmt.Println("8 : ", Ordinalize(8))
 fmt.Println("9 : ", Ordinalize(9))
 fmt.Println("102 : ", Ordinalize(102))
 fmt.Println("-99 : ", Ordinalize(-99))
 fmt.Println("-1021 : ", Ordinalize(-1021))

 }

Output:

1 : st

2 : nd

3 : rd

4 : th

5 : th

6 : th

7 : th

8 : th

9 : th

102 : nd

-99 : th

-1021 : st

1 : 1st

2 : 2nd

3 : 3rd

4 : 4th

5 : 5th

6 : 6th

7 : 7th

8 : 8th

9 : 9th

102 : 102nd

-99 : -99th

-1021 : -1021st