JavaScript: Count the number of vowels in a given string
JavaScript validation with regular expression: Exercise-8 with Solution
Write a JavaScript function to count the number of vowels in a given string.
Test Data:
console.log(alphabetize_string('United States'));
Output :
"SUadeeinsttt"
Pictorial Presentation:

Sample Solution:-
HTML Code:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Write a JavaScript function to count the number of vowels in a given string</title>
</head>
<body>
</body>
</html>
JavaScript Code:
function vowel_count(str) {
return str.match(/[aeiou]/gi).length;
}
console.log(vowel_count('The quick brown fox jumps over the lazy dog'));
Sample Output:
11
Flowchart:

Live Demo:
See the Pen javascript-regexp-exercise-8 by w3resource (@w3resource) on CodePen.
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