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
Interchanging first letters of words in a string in JavaScript
Problem
We are required to write a JavaScript function that takes in a string that contains exactly two words.
Our function should construct and return a new string in which the first letter of the words are interchanged with each other.
Example
Following is the code −
const str = 'hello world';
const interchangeChars = (str = '') => {
const [first, second] = str.split(' ');
const fChar = first[0];
const sChar = second[0];
const newFirst = sChar + first.substring(1, first.length);
const newSecond = fChar + second.substring(1, second.length);
const newStr = newFirst + ' ' + newSecond;
return newStr;
};
console.log(interchangeChars(str));Output
Following is the console output −
wello horld
Updated on: 19-Apr-2021
262 Views
Advertisements