diff --git a/kjg/python-the-hard-way/e28.py b/kjg/python-the-hard-way/e28.py
new file mode 100644
index 0000000..d4a116a
--- /dev/null
+++ b/kjg/python-the-hard-way/e28.py
@@ -0,0 +1,19 @@
+#True and True -> True
+#False and True -> False
+#1 == 1 and 2 == 1 -> False
+#"test" == "test" -> True
+#1 == 1 or 2 != 1 -> True
+#True and 1 == 1 -> True
+#False and 0 != 0 -> False
+#True or 1 == 1 -> True
+#"test" == "testing" -> False
+#1 != 0 and 2 == 1 -> False
+#"test" != "testing" -> True
+#"test" == 1 -> False
+#not (True and False) -> True
+#not(1 == 1 and 0 != 1) -> False
+#not (10 == 1 or 1000 == 1000) -> False
+#not(1 != 10 or 3 == 4) -> False
+#not ("testing" == "testing" and "Zed" == "Cool Guy") -> True
+#1 == 1 and (not("testing" == 1 or 1 == 0)) -> True
+#"chunky" == "bacon" and (not (3 == 4 or 3 == 3)) -> Fasle
diff --git a/kjg/python-the-hard-way/e29.py b/kjg/python-the-hard-way/e29.py
new file mode 100644
index 0000000..a257dc6
--- /dev/null
+++ b/kjg/python-the-hard-way/e29.py
@@ -0,0 +1,35 @@
+people = 21
+cats = 33
+dogs = 14
+
+
+if people < cats:
+    print("Too many cats! The world is doomed!")
+
+if people > cats:
+    print("Not many cats! The world is saved!")
+
+if people < dogs:
+    print("The world is drooled on!")
+
+if people > dogs:
+    print("The world is dry!")
+
+if people != dogs:
+    print("People are not dogs.")
+
+    
+dogs += 5
+
+
+if people >= dogs:
+    print("People are greater than or equal to dogs.")
+
+
+if people <= dogs:
+    print("People are less than or equal to dogs.")
+
+
+if people == dogs:
+    print("People are dogs.")
+
diff --git a/kjg/python-the-hard-way/e30.py b/kjg/python-the-hard-way/e30.py
new file mode 100644
index 0000000..a790c43
--- /dev/null
+++ b/kjg/python-the-hard-way/e30.py
@@ -0,0 +1,28 @@
+people = 21
+cars = 15
+trucks = 30
+
+if cars > people:   #check cars are bigger than people
+    print("We should take the cars.") #print if cars are bigger than people
+elif cars < people: #check cars are smaller than people
+    print("We should not take the cars.") #print if cars are smaller than people
+else:
+    print("We can't decide.") #print if cars are same with people
+
+
+if trucks > cars:   #check trucks are bigger than cars
+    print("That's too many trucks.") #print if trucks  are bigger than cars
+elif trucks < cars:  #check trucks are smaller than cars
+    print("Maybe we could take the trucks.") #print if trucks are smaller than cars
+else:
+    print("We still can't decide.") #print if trucks are same with cars
+    
+if people > trucks:  #check people are bigger than trucks
+    print("Alright, let's just take the trucks.") #print if people are bigger than trucks
+else:
+    print("Fine, let's stay home then.") #print if people are bigger than trucks
+
+if cars > people or trucks < cars: #check cars are bigger than people or trucks are smaller than cars
+    print("cars are many") #print if cars are bigger than people or trucks are smaller than cars
+else:
+    print("trucks or people is bigger") #print not (cars > people or trucks < cars)
diff --git a/kjg/python-the-hard-way/e31.py b/kjg/python-the-hard-way/e31.py
new file mode 100644
index 0000000..e320fc5
--- /dev/null
+++ b/kjg/python-the-hard-way/e31.py
@@ -0,0 +1,48 @@
+print("""You enter a dark room with two doors.
+Do you go through door #1 or door #2?""")
+
+door = input("> ")
+
+if door == "1":
+    print("There's a giant bear here eating a cheese cake.")
+    print("What do you do?")
+    print("1. Take the cake.")
+    print("2. Scream at the bear.")
+
+    bear = input("> ")
+
+    if bear == "1":
+        print("The bear eats your face off. Good job!")
+    elif bear == "2":
+        print("The bear eats your legs off. Good job!")
+    else:
+        print(f"Well, doing {bear} is probably better.")
+        print("Bear runs away.")
+
+elif door == "2":
+    print("You stare into the endless abyss at Cthulhu's retina.")
+    print("1. Blueberries.")
+    print("2. Yellow jacket clothespins.")
+    print("3. Understanding revolvers yelling melodies.")
+
+    insanity = input("> ")
+
+    if insanity == "1" or insanity == "2":
+        print("Your body survives powered by a mind of jello.")
+        print("Good job!")
+    else:
+        print("The insanity rots your eyes into a pool of muck.")
+        print("Good job!")
+else:
+    print("You stumble around and fall on a knife and die. Good job!")
+
+
+if door == "3":
+    print(f"you choose {door}")
+    if int(door) in range(1, 10):
+        print("in 1 between 10")
+    else:
+        print("not in between 10")
+else:
+    print(f"you choose {door}")
+
diff --git a/kjg/python.org b/kjg/python.org
index 301bb4c..400c366 100644
--- a/kjg/python.org
+++ b/kjg/python.org
@@ -110,3 +110,14 @@ practice function and print
 practice import function
 **** ex26
 practice debug code
+*** Python #4:
+**** ex27
+How to use True and Flase
+**** ex28
+How to use Boolean
+**** ex29
+How to use if-statement
+**** ex30
+How to use if-else
+**** ex31
+How to use if, elif