Valid Word

A word is considered valid if:

• It contains a minimum of 3 characters.

• It contains only digits (0-9), and English letters (uppercase and lowercase).

• It includes at least one vowel.

• It includes at least one consonant.

You are given a string word.

Return true if word is valid, otherwise, return false.

Notes:

• 'a', 'e', 'i', 'o', 'u', and their uppercases are vowels.

• A consonant is an English letter that is not a vowel.

LeetCode Problem - 3136

class Solution {
    // Method to check if a word is valid based on the presence of vowels and consonants
    public boolean isValid(String word) {
        // If the word length is less than 3, it's invalid
        if (word.length() < 3) {
            return false;
        }

        // Initialize counts for vowels and consonants
        int vowelCount = 0;
        int consonantCount = 0;

        // Iterate through each character of the word
        for (char ch : word.toCharArray()) {
            // If the character is not a letter or digit, the word is invalid
            if (!Character.isLetterOrDigit(ch)) {
                return false;
            }

            // If the character is a vowel, increment the vowel count
            if ("aeiouAEIOU".indexOf(ch) != -1) {
                vowelCount++;
            } 
            // If the character is a consonant, increment the consonant count
            else if ((ch >= 'a' && ch <= 'z' || ch >= 'A' && ch <= 'Z') && "aeiouAEIOU".indexOf(ch) == -1) {
                consonantCount++;
            }
        }

        // The word is valid if it contains at least one vowel and one consonant
        return vowelCount > 0 && consonantCount > 0;
    }
}