Count letters in a String

     

public class Main {

  public static void main(String[] args) {
    String str = "12345";
    int counter = 0;
    for (int i = 0; i < str.length(); i++) {
      if (Character.isLetter(str.charAt(i)))
        counter++;
    }
    System.out.println(counter + " letters.");
  }
}
//0 letters.

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Count letters in a String : Character « Data Type « Java

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