How can I add some number to string in javascript or jquery

Question

I have a problem. Script parsing csv to html. But number is read as a string. How can I add "0" to numbers that do not have to decimals. For example:

I want to add 0 to all numbers like 4,2

`12,00` is different from `12.00` What do you expect exactly? — Rajaprabhu Aravindasamy, Apr 04 '16 at 11:04
Possible duplicate of [How can I create a Zerofilled value using JavaScript?](http://stackoverflow.com/questions/1267283/how-can-i-create-a-zerofilled-value-using-javascript) — Farside, Apr 04 '16 at 11:42

gurvinder372 · Answer 1 · 2016-04-04T11:27:59.300

2

Try

 var output = "15,2".split(",").map(function(val){ return val > 100 ? val: (val+"00").slice(0,2);}).join(",");
alert(output);
 var output = "15,100".split(",").map(function(val){ return val > 99 ? val: (val+"00").slice(0,2);}).join(",");
alert(output);
 var output = "15,".split(",").map(function(val){ return val > 100 ? val: (val+"00").slice(0,2);}).join(",");
alert(output);

edited Apr 04 '16 at 11:27

answered Apr 04 '16 at 11:08

gurvinder372

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@fcalderan for `15,15` it outputted me `15,15` what should be the output in this case? – gurvinder372 Apr 04 '16 at 11:26
try with `15`, should output `15.00` – Fabrizio Calderan Apr 04 '16 at 11:27
@fcalderan it will now, please check – gurvinder372 Apr 04 '16 at 11:28

Fabrizio Calderan · Answer 2 · 2016-04-04T11:56:22.213

2

In vanillaJS

var num = "14,2";

/* string to number conversion */
num = +(num.replace(',','.'));

/* set 2 digits after decimal point */
num = num.toFixed(2);

/*
Input   Output
--------------
14,25   14.25
14,2    14.20
14      14.00  */

Reduced in a single statement, as suggested in the comments below:

(+num.replace(',','.')).toFixed(2);

if you have an array of strings you could easily convert them using Array.map()

var nums = ["14", "14,2", "14,25"];
nums = nums.map(n => (+n.replace(',','.')).toFixed(2)); 

// => ["14.00", "14.20", "14.25"]

edited Apr 04 '16 at 11:56

answered Apr 04 '16 at 11:09

Fabrizio Calderan

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This is the most correct and most performant answer. Maybe compete with the one-liners and write it like this: `(+num.replace(',','.')).toFixed(2);` ? – A1rPun Apr 04 '16 at 11:31
yes, but for clarity purpose I splitted the code in two readable (and commented) lines, I'm not doing a codegolf competition :) – Fabrizio Calderan Apr 04 '16 at 11:41

Zakaria Acharki · Answer 3 · 2016-04-04T13:50:05.697

1

If you get all strings as posted format in the OP you could use length :

["15,45","12,00","14,2"].forEach(function(v){
    alert(v.split(',')[1].length==1?v+"0":v);
})

edited Apr 04 '16 at 13:50

answered Apr 04 '16 at 11:11

Zakaria Acharki

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Jai · Answer 4 · 2016-04-04T11:36:20.133

0

You can use this:

var arr = ["15,45","12,00","14,2","14,54"];

var newarr = arr.map(function(o){
  var val = o.split(',');
  return val[1].length == 1 ? val.join(',')+"0" : val.join(',');
});

document.querySelector('pre').innerHTML = JSON.stringify(newarr, 0, 4);

<pre></pre>

edited Apr 04 '16 at 11:36

answered Apr 04 '16 at 11:27

Jai

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How can I add some number to string in javascript or jquery

4 Answers4