From 6ad5b9c2b173ca503a8ecbc38070d5fab312a688 Mon Sep 17 00:00:00 2001
From: Madhurendra Nath Tiwari
 <68775519+dev-madhurendra@users.noreply.github.com>
Date: Fri, 22 Sep 2023 13:49:13 +0530
Subject: [PATCH] added numberOfDigitsUsingLog method (#1364)

* added numberOfDigitsUsingLog method

* added JSDoc comment

---------

Co-authored-by: madhuredra <madhuredra.tiwari@zemosolabs.com>
---
 Maths/NumberOfDigits.js           | 12 +++++++++++-
 Maths/test/NumberOfDigits.test.js | 11 ++++++++++-
 2 files changed, 21 insertions(+), 2 deletions(-)

diff --git a/Maths/NumberOfDigits.js b/Maths/NumberOfDigits.js
index 6414c65deb..f2ef656433 100644
--- a/Maths/NumberOfDigits.js
+++ b/Maths/NumberOfDigits.js
@@ -9,4 +9,14 @@
 
 const numberOfDigit = (n) => Math.abs(n).toString().length
 
-export { numberOfDigit }
+/**
+ * Returns the number of digits of a given integer.
+ *
+ * @param {number} n - The integer for which to count digits.
+ * @returns {number} The number of digits in the integer.
+ * @see https://math.stackexchange.com/questions/2145480/how-does-the-logarithm-returns-the-number-of-digits-of-a-number
+ * @author dev-madhurendra
+ */
+const numberOfDigitsUsingLog = (n) => n === 0 ? 1 : Math.floor(Math.log10(Math.abs(n))) + 1
+
+export { numberOfDigit, numberOfDigitsUsingLog }
diff --git a/Maths/test/NumberOfDigits.test.js b/Maths/test/NumberOfDigits.test.js
index 631e2cce36..bf832c8691 100644
--- a/Maths/test/NumberOfDigits.test.js
+++ b/Maths/test/NumberOfDigits.test.js
@@ -1,4 +1,4 @@
-import { numberOfDigit } from '../NumberOfDigits'
+import { numberOfDigit, numberOfDigitsUsingLog } from '../NumberOfDigits'
 
 describe('NumberOfDigits', () => {
   it('should return the correct number of digits for an integer', () => {
@@ -8,4 +8,13 @@ describe('NumberOfDigits', () => {
   it('should return the correct number of digits for a negative number', () => {
     expect(numberOfDigit(-2346243)).toBe(7)
   })
+
+  it.each([
+    [0, 1],
+    [123423232, 9],
+    [-123423232, 9],
+    [9999, 4]
+  ])('should return the correct number of digits in an integer', (value, expected) => {
+    expect(numberOfDigitsUsingLog(value)).toBe(expected)
+  })
 })