JavaScript: Extract a specific number of characters from a string
JavaScript String: Exercise-4 with Solution
Write a JavaScript function to extract a specified number of characters from a string.
Pictorial Presentation:

Test Data :
console.log(truncate_string("Robin Singh",4));
"Robi"
Sample Solution:-
HTML Code:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Extract a specific number of characters from a string</title>
</head>
<body>
</body>
</html>
JavaScript Code:
truncate_string = function (str1, length) {
if ((str1.constructor === String) && (length>0)) {
return str1.slice(0, length);
}
};
console.log(truncate_string("Robin Singh",4));
Sample Output:
Robi
Flowchart:

Live Demo:
See the Pen JavaScript Extract a specific number of characters from a string - string-ex-4 by w3resource (@w3resource) on CodePen.
Improve this sample solution and post your code through Disqus
Previous: Write a JavaScript function to split a string and convert it into an array of words.
Next: Write a JavaScript function to convert a string in abbreviated form.
What is the difficulty level of this exercise?
JavaScript: Tips of the Day
JavaScript: Shorten your "if" statements
Now this is a tricky one.
Shortening your0 "if" statements can be a great way to simplify your code.
However, if you need to write more complicated statements, you should definitely go for the first option.
// Instead of using this if (iAmHungry) { bakeAnEgg() } // You can use this if (iAmHungry) bakeAnEgg() // Or this iAmHungry? bakeAnEgg() : 0
Remember, readability & ease-of-use are more important than a couple less lines of code.
Ref: https://bit.ly/2LBj213
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