add Prime.java, mod README.md, App.java

Author: alexeichuprikov

README.md

@@ -10,6 +10,9 @@ https://asciinema.org/a/5TK9BqwuQriLXfKwwefoqJjLP
 ### Demo 5 (Progression)
 https://asciinema.org/a/lB79E4WkEmp1207S7mYMDvjjQ
 
+### Demo 6 (Prime)
+https://asciinema.org/a/MarrMPMwxoFQsybLk4IbKAvcA
+
 
 ### Hexlet tests and linter status:
 [![Actions Status](https://github.com/alexeichuprikov/qa-auto-engineer-java-project-61/actions/workflows/hexlet-check.yml/badge.svg)](https://github.com/alexeichuprikov/qa-auto-engineer-java-project-61/actions)

app/src/main/java/hexlet/code/App.java

@@ -1,9 +1,6 @@
 package hexlet.code;
 
-import hexlet.code.games.Calc;
-import hexlet.code.games.Even;
-import hexlet.code.games.Gcd;
-import hexlet.code.games.Progression;
+import hexlet.code.games.*;
 
 import java.util.Scanner;
 
@@ -16,6 +13,7 @@ public static void main(String[] args) {
         System.out.println("3 - Calc");
         System.out.println("4 - GCD");
         System.out.println("5 - Progression");
+        System.out.println("6 - Prime");
         System.out.println("0 - Exit");
         System.out.print("Your choice : ");
         String option = scanner.nextLine();
@@ -36,6 +34,9 @@ public static void main(String[] args) {
             case "5":
                 Progression.play();
                 break;
+            case "6":
+                Prime.play();
+                break;
         }
         scanner.close();
     }

app/src/main/java/hexlet/code/games/Prime.java

@@ -0,0 +1,44 @@
+package hexlet.code.games;
+
+import hexlet.code.Engine;
+
+import java.util.Scanner;
+
+public class Prime {
+    public static void play() {
+        String userName = Engine.description();
+        System.out.println("Answer 'yes' if given number is prime. Otherwise answer 'no'.");
+        Scanner scanner = new Scanner(System.in);
+
+        for (int i = 1; i <= Engine.rounds; i++) {
+            int num = (int) (Math.random() * 100) + 1;
+            String rightAnswer = Prime(num);
+
+            System.out.println("Question: " + num);
+            System.out.print("Your answer: ");
+            String answer = scanner.next();
+
+            if (answer.equals(rightAnswer)) {
+                System.out.println("Correct!");
+            } else {
+                System.out.println("'" + answer + "' is wrong answer ;(. Correct answer was '" + rightAnswer + "'.");
+                System.out.println("Let's try again, " + userName + "!");
+                return;
+            }
+        }
+        System.out.println("Congratulations, " + userName + "!");
+    }
+
+
+    public static String Prime(int num) {
+        if (num < 2) {
+            return "no";
+        }
+        for (int i = 2; i <= Math.sqrt(num); i++) {
+            if (num % i == 0) {
+                return "no";
+            }
+        }
+        return "yes";
+    }
+}