How to get numbers from a string in JavaScript

Question

I have a variable which it contains a telephone number in a sentence, to know it better it is like this "tel": "Tel: 01.78.99.93.06", now I need to get just numbers and put in another variable the out put should be like this var nom="0178999306".

How I can do it with jQuery and JavaScript?

Appreciate very much

Hi! Please take the [tour] (you get a badge!) and read through the [help], in particular [*How do I ask a good question?*](/help/how-to-ask) Your best bet here is to do your research, [search](/help/searching) for related topics on SO, and give it a go. ***If*** you get stuck and can't get unstuck after doing more research and searching, post a [mcve] of your attempt and say specifically where you're stuck. People will be glad to help. — T.J. Crowder, Nov 10 '18 at 11:31
with respect I did lots of research and none of them work fine for me. if some one know java script know the answer well. I do not think it needs more details for expert. but thank you very much for your time and I surely care @T.J.Crowder — neda Derakhshesh, Nov 10 '18 at 11:36
Then please demonstrate your attempts at solving the problem using your research; explain where your attempts fail. How they fail. What you expected to happen and what happened instead. — David Thomas, Nov 10 '18 at 11:41

score 4 · Accepted Answer · edited Nov 10 '18 at 18:18

4

The simplest and the most robust method would be to remove all non-numerical values from the string which can be done using a simple regex:

var tel = "Tel: 01.78.99.93.06";
var nom = tel.replace(/\D/g, '');
console.log(nom);

edited Nov 10 '18 at 18:18

Barbaros Özhan

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answered Nov 10 '18 at 12:47

Rory McCrossan

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I found an answer and it solved. but I accept the question while its much more complete . thank you very much – neda Derakhshesh Nov 10 '18 at 14:04

score 2 · Answer 2 · edited Nov 10 '18 at 11:39

2

Use replace. If your var is called telephone, then do:

telephone = telephone.replace(“.”,””).replace(“other unwanted strings”,””);

edited Nov 10 '18 at 11:39

David Thomas

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answered Nov 10 '18 at 11:35

China Syndrome

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it works fine with some changes. thank you very much. with the help of this link https://stackoverflow.com/questions/2390789/how-to-replace-all-dots-in-a-string-using-javascript – neda Derakhshesh Nov 10 '18 at 12:16
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This approach can be simplified using regex to replace all non-numeric characters: `telephone.replace(/[^0-9]/g, '')` – mark_c Nov 10 '18 at 12:39
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Also note that the double quotes you're using will cause syntax errors in JS. – Rory McCrossan Nov 10 '18 at 12:46
@RoryMcCrossan do you think the answer which I have accepted once also could cause syntax errors? – neda Derakhshesh Nov 10 '18 at 14:05

How to get numbers from a string in JavaScript

2 Answers2