Decimal To Word Converter Using Functions in Go

Write a program that will ask the user to give a number and then the program will convert the given number into word equivalent.

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Sample Program Output

Program Listing

/* english.go

Author   : Mr. Jake Rodriguez Pomperada, MAED-IT

Date     : July 31, 2019  Wednesday 3:11 PM

Location : Bacolod City, Negros Occidental

Website  : http://www.jakerpomperada.com

Emails   : jakerpomperada@gmail.com and jake_pomperada@tup.edu.ph

*/

package main

import (

"fmt"

"math"

)

func pow(i int, p int) int {

return int(math.Pow(1000, float64(p)))

}

func spell(n int) string {

to19 := []string{"One", "Two", "Three", "Four", "Five", "Six", "Seven", "Eight", "Nine", "Ten", "Eleven", "Twelve",

",Thirteen", "Fourteen", "Fifteen", "Sixteen", "Seventeen", "Eighteen", "Nineteen"}

tens := []string{"Twenty", "Thirty", "Forty", "Fifty", "Sixty", "Seventy", "Eighty", "Ninety"}

if n == 0 {

return ""

}

if n < 20 {

return to19[n-1]

}

if n < 100 {

return tens[n/10-2] + " " + spell(n%10)

}

if n < 1000 {

return to19[n/100-1] + " Hundred " + spell(n%100)

}

for idx, w := range []string{"Thousand", "Million", "Billion"} {

p := idx + 1

if n < pow(1000, (p+1)) {

return spell(n/pow(1000, p)) + " " + w + " " + spell(n%pow(1000, p))

}

}

return "error"

}

func main() {

var val_num int

fmt.Print("\n")

fmt.Print("\tDecimal To Word Converter Using Functions")

fmt.Print("\n\n")

fmt.Print("\tGive a Number     : ")

fmt.Scanf("%d",&val_num)

result := spell(val_num)

fmt.Print("\n")

fmt.Printf("\tThe given number is %d.",val_num)

fmt.Print("\n\n")

fmt.Print("\t===== TRANSLATION RESULT =====")

fmt.Print("\n\n")

fmt.Printf("\t%s",result)

fmt.Print("\n\n")

fmt.Print("\tEnd of Program")

fmt.Print("\n")

}