JavaScript: Accept a list of words and returns the longest

JavaScript Function: Exercise-25 with Solution

Write a JavaScript function that accept a list of country names as input and returns the longest country name as output

Sample function : Longest_Country_Name(["Australia", "Germany", "United States of America"])
Expected output : "United States of America"

Pictorial Presentation:

JavaScript: Accept a list of words and returns the longest

Sample Solution: -

HTML Code:

<!DOCTYPE html>
  <meta charset="utf-8">
  <title>Find longest word</title>


JavaScript Code:

function Longest_Country_Name(country_name)
  return country_name.reduce(function(lname, country) 
    return lname.length > country.length ? lname : country;
console.log(Longest_Country_Name(["Australia", "Germany", "United States of America"]));


United States of America


Flowchart: JavaScript function: Accept a list of words and returns the longest

Live Demo:

See the Pen JavaScript - Bubble Sort algorithm-function-ex- 24 by w3resource (@w3resource) on CodePen.

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Previous: Write a JavaScript function to apply Bubble Sort algorithm.
Next: Write a JavaScript function to find longest substring in a given a string without repeating characters.

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JavaScript: Tips of the Day

Shorten an array using its length property

A great way of shortening an array is by redefining its length property.

let array = [0, 1, 2, 3, 4, 5, 6, 6, 8, 9]
array.length = 4
// Result: [0, 1, 2, 3]

Important to know though is that this is a destructive way of changing the array. This means you lose all the other values that used to be in the array.

Ref: https://bit.ly/2LBj213