JavaScript: Count the number of vowels in a given string
JavaScript Basic: Exercise-54 with Solution
Write a JavaScript program to count the number of vowels in a given string.
Pictorial Presentation:

Sample Solution:
HTML Code:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width">
<title>JavaScript program to count the number of vowels in a given string.</title>
</head>
<body>
</body>
</html>
JavaScript Code:
function vowel_Count(str)
{
return str.replace(/[^aeiou]/g, "").length;
}
console.log(vowel_Count("Python"));
console.log(vowel_Count("w3resource.com"));
Sample Output:
1 5
Flowchart:

ES6 Version:
function vowel_Count(str)
{
return str.replace(/[^aeiou]/g, "").length;
}
console.log(vowel_Count("Python"));
console.log(vowel_Count("w3resource.com"));
Live Demo:
See the Pen JavaScript - count the number of vowels in a given string - basic-ex-54 by w3resource (@w3resource) on CodePen.
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Previous: Write a JavaScript program to check if the characters a and b are separated by exactly 3 places anywhere (at least once) in a given string.
Next: Write a JavaScript program to check if a given string contains equal number of p's and t's present.
What is the difficulty level of this exercise?
Test your Programming skills with w3resource's quiz.
JavaScript: Tips of the Day
Assigns default values for all properties in an object that are undefined
Example:
const tips_defaults = (obj, ...defs) => Object.assign({}, obj, ...defs.reverse(), obj); console.log(tips_defaults({ p: 1 }, { q: 2 }, { q: 6 }, { p: 3 }));
Output:
[object Object] { p: 1, q: 2 }
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