Encrypting a String Based on an Algorithm Using JavaScript

Problem

We are required to write a JavaScript function that takes in a string and encrypts it based on the following algorithm −

• The string contains only space separated words.

• We need to encrypt each word in the string using the following rules−

  • The first letter needs to be converted to its ASCII code.

  • The second letter needs to be switched with the last letter.

Therefore, according to this, the string ‘good’ will be encrypted as ‘103doo’.

Example

Following is the code −

 Live Demo

const str = 'good'; const encyptString = (str = '') => {    const [first, second] = str.split('');    const last = str[str.length - 1];    let res = '';    res += first.charCodeAt(0);    res += last;    for(let i = 2; i < str.length - 1; i++){       const el = str[i];       res += el;    };    res += second;    return res; }; console.log(encyptString(str));

Output

103doo