To make it working we can either get rid of a period with String(number).replace('.', '').length, or count the digits with regular expression: String(number).match(/\d/g).length. In terms of speed potentially the fastest way to get number of digits in the given number is to do it mathematically.

May 6, 2024 · There are several methods that can be used to Count Digits of a Given Number: In this approach, we are using the reduce function. By converting the number to a string and splitting it into individual digits, the function accumulates the count using the reduce method, return String(num).split('').reduce( (count, digit) => count + 1, 0);

Nov 11, 2019 · JavaScript does not have built in integer division so you need to use Math.floor to emulate it. Complete example with some fixes: var count = 0; while (num > 0) { num = Math.floor(num / 10); count++; return count; num = Number(prompt("Enter number:"));

Aug 31, 2020 · Learn how to count the number of digits in a given number using JavaScript with this comprehensive guide.

Mar 1, 2025 · Write a JavaScript function that uses iterative division to count the digits in an integer without string conversion. Write a JavaScript function that handles negative numbers by taking the absolute value before counting digits.

Dec 13, 2019 · One way to count how many digits a number has is to convert the number to a string and then count the characters. [1000343490884773].toString().split('').length // -> 16 // Hey, it's 16 digits! This will return the correct length, but it feels a little bit like cheating. What if we don't want to convert the number to a string?

Apr 6, 2014 · * Count the number of significant digits of a number. * For example: * 2.34 returns 3. * 0.0034 returns 2. * 120.5e+3 returns 4. * @param {Number} value. * @return {Number} The number of significant digits. */ return value. .toExponential() .replace(/e[\+\-0-9]*$/, '') // remove exponential notation.

Oct 6, 2022 · In this article, we’ll look at how to get the number of digits of a number with JavaScript. We can get the number of digits of a non-negative integer with the Number.prototype.toString method. For instance, we can write: to get the number of digits of 12345. To do that, we create the getLength function that takes the number parameter.

Nov 20, 2022 · I'll show you 2 examples, to show how to get number of digits from a number both either it's an integer or float number. So, let's see how we can easily get number of digits.

Oct 23, 2019 · One way to count how many digits a number has is to convert the number to a string and then count the characters.Here's an example: [1000343490884773].toString ().split ('').length // -> 16 // Hey, it's 16 digits!