Thread: not sure why the 'else is not working

When i run this code the 'else' output always displays. Why is that ??

import java.util.Scanner;
public class Post {
    public static void main(String[] args) {
        Scanner myKeyboard = new Scanner (System.in);
 
    String post1 = "bill",post2 = "circular", post3 = "postcard", post4 = "letter";
 
        System.out.println("Enter letter type");
        String post = myKeyboard.nextLine();
 
        if (post1.equalsIgnoreCase(post)) {
            System.out.println("bills must be paid");
        }
 
        if (post2.equalsIgnoreCase(post)) {
            System.out.println("circulars are thrown away");
        } 
 
        if (post3.equalsIgnoreCase(post)) {
            System.out.println("postcards are put on the wall");
        }
 
        else if (post4.equalsIgnoreCase(post)) {
            System.out.println("personal letters are read and have replies written for them");
        }
 
        else {
            System.out.println("Letter type not recognised");
        }
        System.exit(0);

Sorry for posting in the wrong section, i knew the code was not a loop, but i did not know it was a control statement. I'm not sure how you supposed to know these things when you're a total noob, tbh, but hey ho.

Thank you for your replies, it worked a treat, but how come this doesn't work the same way. If you enter a number you get a specific answer, but i want it so if you enter anything else, like a character, you get the last 'else' output.

import java.util.Scanner;
public class Positive {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
 
        int num;
 
        System.out.println("Enter number");
        num = input.nextInt();
 
        if (num < 0) {
            System.out.println("This is a negative number");
        }
 
        else if (num == 0) {
            System.out.println("Zero");
        }
 
        else if (num > 0) {
            System.out.println("This is a postive number");
        }
 
        else {
            System.out.println("Please enter a valid number");

Thanks in advance.