Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
Physics
Chemistry
Biology
Mathematics
English
Economics
Psychology
Social Studies
Fashion Studies
Legal Studies
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
Finding even length numbers from an array in JavaScript
We are required to write a JavaScript function that takes in an array of Integers as the first and the only argument. The function should then construct and return a new array that contains only those elements from the original array that contains an even number of digits.
For example −
If the input array is −
const arr = [12, 6, 123, 3457, 234, 2];
Then the output should be −
const output = [12, 3457];
Example
The code for this will be −
const arr = [12, 6, 123, 3457, 234, 2];
const findEvenDigitsNumber = (arr = []) => {
const res = [];
const { length: l } = arr;
for(let i = 0; i < l; i++){
const num = Math.abs(arr[i]);
const numStr = String(num);
if(numStr.length % 2 === 0){
res.push(arr[i]);
};
};
return res;
};
console.log(findEvenDigitsNumber(arr));Output
And the output in the console will be −
[12, 3457]
Updated on: 26-Feb-2021
321 Views
Advertisements