Fixed several bugs in enqueue() function

main.py

@@ -114,33 +114,37 @@ def enqueue(self,ele,qn):
         if self.isFull():
             print("\nMaximum limit reached !")
         else:
+
             inv_data = pd.read_csv('data/inventory.csv')
-            flag1 = 0
-            flag2 = 0
+            flag = 0
             for i in range(len(inv_data)):
-                flag1 = flag2 =  0
+                flag = 0
                 if inv_data["Product_Name"][i]==ele.upper():
                     if qn.isnumeric() == True:
+
                         if int(qn) <= inv_data["Available_Stock"][i]:
+
                             self.prod_name.append(ele.upper())
                             self.quantity.append(int(qn))
                             self.price.append(inv_data["Selling_Price"][i])
+
                             if self.front==None and self.rear==None:
                                 self.front=self.rear=0
                             else:
                                 self.rear += 1
                             print("\n>>>>>>>> Product is Added to the Order. <<<<<<<<\n")
                             break
+
                         else:
-                            flag1 += 1
+                            print("\n!! Sorry for the inconvenience... Your required product is Out of Stock !!")
+                            break
                     else:
-                        flag2 = 1
+                        print("\n!! Invalid Amount of Quantity !!")
+                        break
                 else:
-                    flag1 += 1
-            if flag1 != 0:
-                print("\n!! Sorry for the inconvenience... Your required product is either Out of Stock or Not in our Stock !!")
-            if flag2 != 0:
-                print("\n!! Invalid Amount of Quantity !!")
+                    flag = 1
+            if flag == 1:
+                print("The requested item is not in the inventory or invalid.")
 
     # FUNCTION TO REMOVE A PRODUCT FROM THE BILL
     def remove(self,ele):