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POJavaScript numbers to Words
 

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  1. POJavaScript numbers to Words
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    <p>I'm trying to convert numbers into english words, for example <strong>1234</strong> would become: "<strong>one thousand two hundred thirty four</strong>".</p> <p>My Tactic goes like this:</p> <ul> <li><p>Separate the digits to three and put them on Array (<code>finlOutPut</code>), from right to left.</p></li> <li><p>Convert each group (each cell in the <code>finlOutPut</code> array) of three digits to a word (this what the <code>triConvert</code> function does). If all the three digits are zero convert them to <code>"dontAddBigSuffix"</code></p></li> <li><p>From Right to left, add <em>thousand, million, billion, etc</em>. If the <code>finlOutPut</code> cell equals <code>"dontAddBigSufix"</code> (because it was only zeroes), don't add the word and set the cell to <code>" "</code> (nothing).</p></li> </ul> <p>It seems to work pretty well, but I've got some problems with numbers like 19000000<strong>9</strong>, converted to: "<em>one hundred ninety million</em>". Somehow it "forgets" the last numbers when there are a few zeros.</p> <p>What did I do wrong? Where is the bug? Why does it not work perfectly?</p> <pre> &#60;html&#62; &#60;head&#62; &#60;meta http-equiv="Content-Type" content="text/html;charset=utf-8"/&#62; &#60;script type="text/javascript"&#62; function update(){ var bigNumArry = new Array('', ' thousand', ' million', ' billion', ' trillion', ' quadrillion', ' quintillion'); var output = ''; var numString = document.getElementById('number').value; var finlOutPut = new Array(); if (numString == '0') { document.getElementById('container').innerHTML = 'Zero'; return; } if (numString == 0) { document.getElementById('container').innerHTML = 'messeg tell to enter numbers'; return; } var i = numString.length; i = i - 1; //cut the number to grups of three digits and add them to the Arry while (numString.length &#62; 3) { var triDig = new Array(3); triDig[2] = numString.charAt(numString.length - 1); triDig[1] = numString.charAt(numString.length - 2); triDig[0] = numString.charAt(numString.length - 3); var varToAdd = triDig[0] + triDig[1] + triDig[2]; finlOutPut.push(varToAdd); i--; numString = numString.substring(0, numString.length - 3); } finlOutPut.push(numString); finlOutPut.reverse(); //conver each grup of three digits to english word //if all digits are zero the triConvert //function return the string "dontAddBigSufix" for (j = 0; j &#60; finlOutPut.length; j++) { finlOutPut[j] = triConvert(parseInt(finlOutPut[j])); } var bigScalCntr = 0; //this int mark the million billion trillion... Arry for (b = finlOutPut.length - 1; b &#62;= 0; b--) { if (finlOutPut[b] != "dontAddBigSufix") { finlOutPut[b] = finlOutPut[b] + bigNumArry[bigScalCntr] + ' , '; bigScalCntr++; } else { //replace the string at finlOP[b] from "dontAddBigSufix" to empty String. finlOutPut[b] = ' '; bigScalCntr++; //advance the counter } } //convert The output Arry to , more printable string for(n = 0; n&#60;finlOutPut.length; n++){ output +=finlOutPut[n]; } document.getElementById('container').innerHTML = output;//print the output } //simple function to convert from numbers to words from 1 to 999 function triConvert(num){ var ones = new Array('', ' one', ' two', ' three', ' four', ' five', ' six', ' seven', ' eight', ' nine', ' ten', ' eleven', ' twelve', ' thirteen', ' fourteen', ' fifteen', ' sixteen', ' seventeen', ' eighteen', ' nineteen'); var tens = new Array('', '', ' twenty', ' thirty', ' forty', ' fifty', ' sixty', ' seventy', ' eighty', ' ninety'); var hundred = ' hundred'; var output = ''; var numString = num.toString(); if (num == 0) { return 'dontAddBigSufix'; } //the case of 10, 11, 12 ,13, .... 19 if (num &#60; 20) { output = ones[num]; return output; } //100 and more if (numString.length == 3) { output = ones[parseInt(numString.charAt(0))] + hundred; output += tens[parseInt(numString.charAt(1))]; output += ones[parseInt(numString.charAt(2))]; return output; } output += tens[parseInt(numString.charAt(0))]; output += ones[parseInt(numString.charAt(1))]; return output; } &#60;/script&#62; &#60;/head&#62; &#60;body&#62; &#60;input type="text" id="number" size="70" onkeyup="update();" /*this code prevent non numeric letters*/ onkeydown="return (event.ctrlKey || event.altKey || (47&#60;event.keyCode && event.keyCode&#60;58 && event.shiftKey==false) || (95&#60;event.keyCode && event.keyCode&#60;106) || (event.keyCode==8) || (event.keyCode==9) || (event.keyCode&#62;34 && event.keyCode&#60;40) || (event.keyCode==46) )"/&#62; &#60;br/&#62; &#60;div id="container"&#62;Here The Numbers Printed&#60;/div&#62; &#60;/body&#62; &#60;/html&#62; </pre>
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    1. COJust an interesting link in case you didn't know: [http://www.google.com/cal](http://goo.gl/m1Rbs)
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    2. COWhat is the input range? (i.e. what is the smallest and largest numbers you have to handle?)
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    3. COBTW, [here is the same question for Java](http://stackoverflow.com/questions/3911966/). You could probably adapt it to JavaScript pretty easily.
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      1. USMatt Ball
 

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