Hi, I was wondering if you could guys can help with this code

package charactercountandembeddedwordsearch;
 
import java.util.Scanner;
 
public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        System.out.print("argument input : ");
 
        // 1
        String str = scanner.nextLine();
        scanner.close();
 
        // 2
        str = str.toLowerCase();
 
        int vCount = 0, cCount = 0;  
        //3
        for (int i = 0; i < str.length(); i++) 
        {
            //4. Checks whether a character is a vowel
            if (str.charAt(i) == 'a' || str.charAt(i) == 'e' || str.charAt(i) == 'i'
                               || str.charAt(i) == 'o' || str.charAt(i) == 'u') {
                // Increments the vowel counter
                vCount++;
            }
            //5. Checks whether a character is a consonant
            else if (str.charAt(i) >= 'a' && str.charAt(i) <= 'z') 
            {
                // Increments the consonant counter
                cCount++;
            }
        }
        //6
        System.out.println("Number of vowels: " + vCount);
        System.out.println("Number of consonants: " + cCount);
    }
}