Count Lowercase Letters in Java

Count number of lowercase letters in a string.

BeginnerModule 4: String ProgramsExample 18 of 25
count-lowercase-letters.java
1import java.util.Scanner;
2
3public class Main {
4 public static void main(String[] args) {
5 Scanner sc = new Scanner(System.in);
6 System.out.print("Enter a string: ");
7 String s = sc.nextLine();
8
9 int count = 0;
10 for (int i = 0; i < s.length(); i++) {
11 if (Character.isLowerCase(s.charAt(i))) {
12 count++;
13 }
14 }
15 System.out.println("Lowercase letters: " + count);
16 sc.close();
17 }
18}

Output

Enter a string: Hello
Lowercase letters: 4

What's going on

We use Character.isLowerCase on each character.