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Converting numbers to the word equivalent.

, 12 May 2013
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If your tutor asks you to convert numbers to words (i.e. 565 to a string "Five hundred and sixty-five") then you are not alone! Here is the simplest, most foolproof way to do it.
If your tutor asks you to convert numbers to words (i.e. 565 to a string "Five hundred and sixty-five") then you are not alone! This question gets asked here very frequently, so here is the simple, foolproof way to solve your problem. It shows the outline of how to do it, and it is then up to you to fill in the detail, comments etc. - otherwise every-bodies would look the same, and you might get caught for copying!
        public static string ConvertToWords(int number)
            {
            switch (number)
                {
                case 0:
                    return "Zero";
                case 1:
                    return "One";
                ...
                case 568:
                    return "Five hundred and sixty-eight";
                case 569:
                    return "Five hundred and sixty-nine";
                }
            throw new ArgumentOutOfRangeException("Number greater than infinity!");
            }
 
I cannot remember who originally posted this coding gem, and I can't find it with a quick search, but if you know who did post it let me know and I will provide full credit.
 

The original version of this software was written by Smithers-Jones[^] in C++ and is available here[^] My thanks for the inspiration and the excellent work!
 
I am indebted to Luc Pattyn for pointing out the error in versions before V3.0 regarding the placement of a hyphen between the tens and unit digits. He correctly pointed out here[^] that numbers should not be written as "twenty one" but as "twenty-one".
 
[edit]V2.0: Credit for original version added - OriginalGriff[/edit]
[edit]V3.0: Corrected the hyphenation between the tens digit and the units digit - OriginalGriff[/edit]
[edit]V4.0: Link to the message of Luc Pattyn corrected - ProgramFOX[/edit]

License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

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About the Author

OriginalGriff
CEO
Wales Wales
Born at an early age, he grew older. At the same time, his hair grew longer, and was tied up behind his head.
Has problems spelling the word "the".
Invented the portable cat-flap.
Currently, has not died yet. Or has he?
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Comments and Discussions

 
SuggestionBe serious :-) Pinmemberrwtrecasd14-May-13 6:11 
GeneralMy vote of 5 PinmemberTnTinMn13-May-13 16:42 
QuestionIt reminds me... PinmemberBarrRobot13-May-13 14:05 
GeneralMy vote of 5! PinprofessionalMatt T Heffron13-May-13 11:49 
QuestionYou gotta be kidding... You voted this 5 stars? Pinmembermarsman_CA13-May-13 8:46 
AnswerRe: You gotta be kidding... You voted this 5 stars? Pinmembermarsman_CA13-May-13 8:49 
GeneralRe: You gotta be kidding... You voted this 5 stars? PinprofessionalRavi Bhavnani13-May-13 9:10 
GeneralRe: You gotta be kidding... You voted this 5 stars? PinprotectorOriginalGriff13-May-13 9:35 
GeneralRe: You gotta be kidding... You voted this 5 stars? PinprotectorOriginalGriff13-May-13 9:36 
QuestionAn optimised answer PinmemberJuan Falgueras Cano13-May-13 8:24 
GeneralMy vote of 4 PinmemberJuan Falgueras Cano13-May-13 8:22 
SuggestionNice, but... PinprofessionalRavi Bhavnani13-May-13 5:19 
QuestionFunny! PinmemberDidiKunz12-May-13 23:23 
Questionmy vote of 5 PinprofessionalSimon_Whale12-May-13 22:35 
AnswerRe: my vote of 5 PinprotectorOriginalGriff12-May-13 22:47 
GeneralMy vote of 4 PinprofessionalMarco Bertschi12-May-13 9:37 
GeneralRe: My vote of 4 PinprotectorOriginalGriff12-May-13 21:31 
GeneralMy vote of 1 PinmemberStephen Hardie12-May-13 8:19 
GeneralRe: My vote of 1 PinprofessionalMarco Bertschi12-May-13 9:34 
GeneralMy vote of 5 + There is a shorter way Pinmember ProgramFOX12-May-13 6:57 
QuestionMy vote of 5 PinmemberJackDingler14-Jan-13 7:15 
AnswerRe: My vote of 5 PinprofessionalMarco Bertschi12-May-13 9:35 
GeneralMy vote of 5 PinmemberSoMad10-Jul-12 17:01 
This is funny, but there is a scary side to it - this Tip/Trick is the 3rd most popular on CodeProject.
 
You should make a version for handling Roman Numerals Smile | :)
 
Soren Madsen
GeneralRe: My vote of 5 PinmvpOriginalGriff10-Jul-12 21:50 
GeneralRe: My vote of 5 PinmemberSoMad10-Jul-12 22:02 

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