code-boxx/0-JS-ADD-COMMA.MD

## 0-JS-ADD-COMMA.MD

      
    Raw
  

              0-JS-ADD-COMMA.MD
            
          
    JAVASCRIPT ADD COMMA TO NUMBER

https://code-boxx.com/add-comma-to-numbers-javascript/
LICENSE

Copyright by Code Boxx
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

  
## 1-locale.html
<!DOCTYPE html>
<html>
  <head>
    <title>Add Comma</title>
    <script>
    // (A) THE NUMBER
    var num = 1234567.89;

    // (B) TO LOCALE STRING
    console.log(num.toLocaleString("en-US")); // 1,234,567.89
    console.log(num.toLocaleString("fr-FR")); // 1 234 567,89
    console.log(num.toLocaleString("ja-JP", { style: "currency", currency: "JPY" }));
    </script>
  </head>
  <body></body>
</html>

## 2-replace.html
<!DOCTYPE html>
<html>
  <head>
    <title>Add Comma</title>
    <script>
    // CREDIT: https://stackoverflow.com/questions/2901102/how-to-print-a-number-with-commas-as-thousands-separators-in-javascript
    // (A) THE NUMBER
    var num = 1234567.89;

    // (B) CONVERT TO STRING & REPLACE
    var commas = num.toString().replace(/\B(?=(\d{3})+(?!\d))/g, ",");
    console.log(commas); // 1,234,567.89
    </script>
  </head>
  <body></body>
</html>

## 3-manual.html
<!DOCTYPE html>
<html>
  <head>
    <title>Add Comma</title>
    <script>
    // (A) ADD COMMAS TO SEPERATE GIVEN NUMBER
    //  num : original number
    //  per : add comma per n digits (default 3)
    //  places : number of decimal places (default 2)
    function addComma (num, per, places) {
      // (A1) SET DEFAULTS
      if (per==undefined) { per = 3; }
      if (places==undefined) { places = 2; }

      // (A2) NO DECIMAL PLACES - ROUND OFF
      // REMOVE THIS IF YOU DON'T WANT TO ROUND OFF
      if (places==0) { num = Math.round(num); }

      // (A3) SPLIT WHOLE & DECIMAL NUMBERS
      var cString = num.toString(),
          cDot = cString.indexOf("."),
          cWhole = "", cDec = "";
      if (cDot == -1) {
        cWhole = cString;
        cDec = 0;
      } else {
        cWhole = cString.substring(0, cDot);
        cDec = cString.substring(cDot+1);
      }

      // (A4) ADD COMMAS TO WHOLE NUMBER
      var aComma = "", count = 0;
      if (cWhole.length > per) { for (let i=(cWhole.length-1); i>=0; i--) {
        aComma = cWhole.charAt(i) + aComma;
        count++;
        if (count == per && i!=0) {
          aComma = "," + aComma;
          count = 0;
        }
      }} else { aComma = cWhole; }

      // (A5) ROUND OFF TO GIVEN DECIMAL PLACES
      if (places==0) { cDec = ""; }
      else {
        cDec = +("0." + cDec);
        cDec = cDec.toFixed(places).toString().substring(1);
      }

      // (A6) RETURN "WHOLE WITH COMMA" PLUS DECIMAL PLACES
      return aComma + cDec;
    }

    // (B) TEST
    // (B1) WHOLE NUMBER
    var whole = 123456789;
    console.log(addComma(whole)); // 123,456,789.00
    console.log(addComma(whole, 4, 0)); // 1,2345,6789

    // (B2) DECIMAL
    var dec = 23456.78;
    console.log(addComma(dec)); // 23,456.78
    console.log(addComma(dec, 2, 0)); // 2,34,57
    </script>
  </head>
  <body></body>
</html>
	<!DOCTYPE html>
	<html>
	<head>
	<title>Add Comma</title>
	<script>
	// (A) THE NUMBER
	var num = 1234567.89;

	// (B) TO LOCALE STRING
	console.log(num.toLocaleString("en-US")); // 1,234,567.89
	console.log(num.toLocaleString("fr-FR")); // 1 234 567,89
	console.log(num.toLocaleString("ja-JP", { style: "currency", currency: "JPY" }));
	</script>
	</head>
	<body></body>
	</html>