added a random number method

Calculator.java

 
             if (toDo.equals("quit")){
                 off = true;
-                System.out.println("Goodbye!!");
+                System.out.println("Goodbye!! \n \n");
 
             } else {
                 switch (toDo) {
                     calc.printAns(calc.switchDisplayMode());
                     break;
                     
+                    case "random number":
+                    result = calc.randomNumber();
+                    memory = result;
+                    calc.printAns(String.valueOf(result));
+                    break;
+
+                    
 
                 }
             }

MathMethods.java

         }
         return answer;
     }
+    
+    public static double randomNumber() {
+    Random rand = new Random();
+    return rand.nextDouble()*101;
+    
+    }
 
     public static void printAns(String printAnswer){
         System.out.println("ANSWER: " + printAnswer + "\n \n");