Remove vowel from a string and return reversed the string program in JavaScript

You can create a function in JavaScript that removes vowels from a string and then returns the reversed version of the resulting string. Here’s an example implementation:

JavaScript Program: 

function removeVowelsAndReverse(str) {

    // Remove vowels using a regular expression

    const withoutVowels = str.replace(/[aeiouAEIOU]/g, '');

    // Reverse the string

    const reversed = withoutVowels.split('').reverse().join('');

    return reversed;

}

// Example usage

const inputString = "Hello World!";

const result = removeVowelsAndReverse(inputString);

console.log(result); // Output: "!dlrW llH"

Here’s a breakdown of the JavaScript code that removes vowels from a string and returns the reversed version:

function removeVowelsAndReverse(str) {

    // Remove vowels using a regular expression

    const withoutVowels = str.replace(/[aeiouAEIOU]/g, '');

    // Reverse the string

    const reversed = withoutVowels.split('').reverse().join('');

    return reversed;

}

Breakdown:

Function Declaration:

function removeVowelsAndReverse(str): This defines a function named removeVowelsAndReverse that takes a single parameter str, which is the input string.

Remove Vowels:

const withoutVowels = str.replace(/[aeiouAEIOU]/g, '');

str.replace(...): This method replaces parts of the string.

/[aeiouAEIOU]/g: This is a regular expression that matches all vowels (both lowercase and uppercase).

'': This is the replacement string (empty), meaning all matched vowels will be removed.

The result is stored in the variable withoutVowels.

Reverse the String:

const reversed = withoutVowels.split('').reverse().join('');

withoutVowels.split(''): This splits the string into an array of individual characters.

.reverse(): This method reverses the array of characters.

.join(''): This joins the reversed array back into a single string.

The result is stored in the variable reversed.

Return the Result:

return reversed;: This returns the final reversed string without vowels.

Example Usage:

const inputString = "Hello World!";

const result = removeVowelsAndReverse(inputString);

console.log(result); // Output: "!dlrW llH"

In this example, the input string "Hello World!" will have its vowels removed to become "Hll Wrld!", which is then reversed to "!dlrW llH".