// Zorah Fung, CSE 142
// An example of using a while loop and a sentinel loop
import java.util.*;

public class WhileLoops {
   public static final String SENTINEL = "quit";

   public static void main(String[] args) {
      firstPrime();
      sentinelLoop();
   }
   
   public static void firstPrime() {
      // find the first factor of 91, other than 1
      int n = 91;
      int factor = 2; // initialization
      while (n % factor != 0) { // test
         factor++; // update
      }
      System.out.println("The first factor is: " + factor);
   }
   
   public static void sentinelLoop() {
      Scanner console = new Scanner(System.in);
      // all variable(s) in your while loop test
      // MUST be declared before/outside the while loop
        
      // fencepost problem: pull first post out
      int totalChars = 0;
      /* post */ System.out.print("Type a word (or \"" + SENTINEL + "\" to exit): ");
      /* post */ String word = console.next();
      while (!word.equals(SENTINEL)) {
         /* wire */ totalChars += word.length();
         /* post */ System.out.print("Type a word (or \"" + SENTINEL + "\" to exit): ");
         /* post */ word = console.next();
      }
      System.out.println("The total number of characters is: " + totalChars);
   }
}