Roman Numeral Converter 4

Ben Joffe Feb 2, 2004

Convert Arabic numerals to roman numerals with the click of a button. Numbers work up to the tens of billions.

The JavaScript Source: Math Related: Roman Numeral Converter

Simply click inside the window below, use your cursor to highlight the script, and copy (type Control-c or Apple-c) the script into a new file in your text editor (such as Note Pad or Simple Text) and save (Control-s or Command-s). The script is yours!!!

<!-- TWO STEPS TO INSTALL ROMAN NUMERAL CONVERTER:

1.  Copy the coding into the HEAD of your HTML document

2.  Add the last code into the BODY of your HTML document  -->

<HEAD>

function romanise(){

var persian=numeral.value;

var roman="";

var ronumdashes="";

var buffer=10-persian.length;

while (buffer>0) {persian="0"+persian;buffer--}

var units=new Array("","I","II","III","IV","V","VI","VII","VIII","IX");

var tens=new Array("","X","XX","XXX","XL","L","LX","LXX","LXXX","XC");

var hundreds=new Array("","C","CC","CCC","CD","D","DC","DCC","DCCC","CM");

var thousands=new Array("","M","MM","MMM","MV","V","VM","VMM","VMMM","MX");

var billionsdashes=new Array("","=","==","===","=≡","≡","≡=","≡==","≡===","=≡");

romandashes=billionsdashes[persian.substring(0,1)];

var hundredmillionsdashes=new Array("","=","==","===","==","=","==","===","====","==");

romandashes+=hundredmillionsdashes[persian.substring(1,2)];

var tenmillionsdashes=new Array("","=","==","===","==","=","==","===","====","==");

romandashes+=tenmillionsdashes[persian.substring(2,3)];

var millionsdashes=new Array("","_","__","___","_=","=","=_","=__","=___","_=");

romandashes+=millionsdashes[persian.substring(3,4)];

var hundredthousandsdashes=new Array("","_","__","___","__","_","__","___","____","__");

romandashes+=hundredthousandsdashes[persian.substring(4,5)];

var tenthousandsdashes=new Array("","_","__","___","__","_","__","___","____","__");

romandashes+=tenthousandsdashes[persian.substring(5,6)];

var thousandsdashes=new Array("","","",""," _","_","_","_","_"," _");

romandashes+=thousandsdashes[persian.substring(6,7)];

roman=thousands[persian.substring(0,1)];

roman+=hundreds[persian.substring(1,2)];

roman+=tens[persian.substring(2,3)];

roman+=thousands[persian.substring(3,4)];

roman+=hundreds[persian.substring(4,5)];

roman+=tens[persian.substring(5,6)];

roman+=thousands[persian.substring(6,7)];

roman+=hundreds[persian.substring(7,8)];

roman+=tens[persian.substring(8,9)];

roman+=units[persian.substring(9,10)];

result.innerHTML=romandashes+"<br>"+roman+"<p><a href=http://www.javascriptsource.com/>http://www.javascriptsource.com</a><br>by Ben Joffe";

}

</script>

</HEAD>

<BODY>

<p><input type="text" name=numeral size="10" onKeypress="if (event.keyCode<48 || event.keyCode>57) event.returnValue=false;" maxlength="10"><input type="button" value="Convert" onclick="romanise()"></p>

<tt id=result style=font-size:14pt>Enter a numeral into the box to have it converted into Roman Numerals

<font face="arial, helvetica" size"-2">Free JavaScripts provided<br>

by <a href="http://javascriptsource.com">The JavaScript Source</a></font>

</center><p>

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Roman Numeral Converter 4

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