How to get the last digit of a string in javascript

Question

I am using javascript, i want to get the last digit of a string. The following is my code,

var idval = focused.id;
var lastChar1 = idval.substr(idval.length - 1);

Suppose myid name is idval5 means, it correctly returns 5

But if id name is idval21 means, it is returning 1 only. But i want 21 as a output.

Please anyone help

Is the digit always at the very end, or so you want to find the last digit appearing anywhere in the string? — deceze, Aug 29 '17 at 11:18
const digits = yourString.split('').filter(item => !isNaN(item)); if (digits.length > 0) { console.log(digits[digits.length - 1)); } — Egor, Aug 29 '17 at 11:29

score 5 · Answer 1 · answered Aug 29 '17 at 11:21

5

You could use a regular expression which searches for digits and for the end of the string.

function getLastDigits(s) {
    return s.match(/\d+$/)[0];
}

console.log(['idval2', 'idval21'].map(getLastDigits));

answered Aug 29 '17 at 11:21

Nina Scholz

1 Answers1