Count Lowercase Letters

Count number of lowercase letters in a string.

JavaBeginner

Java

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        System.out.print("Enter a string: ");
        String s = sc.nextLine();

        int count = 0;
        for (int i = 0; i < s.length(); i++) {
            if (Character.isLowerCase(s.charAt(i))) {
                count++;
            }
        }
        System.out.println("Lowercase letters: " + count);
        sc.close();
    }
}

Output

Enter a string: Hello
Lowercase letters: 4

We use Character.isLowerCase on each character.

Count Uppercase Letters

Extract Numbers