w3resource
JavaScript Exercises

JavaScript: Truncate a string to a certain number of words

JavaScript String: Exercise-24 with Solution

Write a JavaScript function to truncate a string to a certain number of words.

Test Data:
console.log(truncate('The quick brown fox jumps over the lazy dog', 4));
Output:
"The quick brown fox"

Pictorial Presentation:

JavaScript: Truncate a string to a certain number of words

Sample Solution:-

HTML Code:

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
<title>JavaScript function to truncate a string to a certain number of words</title>
</head>
<body>

</body>
</html>

JavaScript Code:

function truncate(str, no_words) {
    return str.split(" ").splice(0,no_words).join(" ");
}

console.log(truncate('The quick brown fox jumps over the lazy dog', 4));

Sample Output:

The quick brown fox

Flowchart:

Flowchart: JavaScript- Truncate a string to a certain number of words

Live Demo:

See the Pen JavaScript Truncate a string to a certain number of words - string-ex-24 by w3resource (@w3resource) on CodePen.


Improve this sample solution and post your code through Disqus

Previous: Write a JavaScript function to strip leading and trailing spaces from a string.
Next: Write a JavaScript function to alphabetize a given string.

What is the difficulty level of this exercise?