Finding the largest 5 digit number within the input number using JavaScript

Problem

We are required to write a JavaScript function that takes in a string number of at least five digits. Our function should return the greatest sequence of five consecutive digits found within the number given.

Example

Following is the code −

 Live Demo

const num = '123546544'; const findGreatestFiveDigit = (num = '') => {    const str = num.toString();    const arr = [];    for(let i = 0; i < str.length; i++){       arr.push(str.slice(i, i + 5));    };    return Math.max(...arr); }; console.log(findGreatestFiveDigit(num));

Output

54654