Create a function disp3char which takes a string as a parameter and displays all the 3 letter words of the sentence.

Question

example:
entered string is
Hii rahul you are a nice person.
output: Hii you are

Answer 1

Javascript:
function disp3char(string){
string = string || "There was no input";
const allWords = string.split(" "),
words = allWords.filter(function(element){
return element.length === 3;
});
console.log(words.join(" "));
}

Warning: this may throw errors if there are less than 3 words.

Answer 2

JavaScript:
const disp3char = s => s.split(' ').filter(x => x.length === 3).join(' ');

RegEx (all 3-letter words in group 1):
/(?:(?:(\w{3})(?:\s+|$))|(?:\w+\s*?))/img

The RegEx works on regex101.com but not in the JS regex engine.