diff --git a/.idea/.gitignore b/.idea/.gitignore
new file mode 100644
index 0000000..26d3352
--- /dev/null
+++ b/.idea/.gitignore
@@ -0,0 +1,3 @@
+# Default ignored files
+/shelf/
+/workspace.xml
diff --git a/.idea/PythonforCybersecurity-example.iml b/.idea/PythonforCybersecurity-example.iml
new file mode 100644
index 0000000..d859cb1
--- /dev/null
+++ b/.idea/PythonforCybersecurity-example.iml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module type="PYTHON_MODULE" version="4">
+  <component name="NewModuleRootManager">
+    <content url="file://$MODULE_DIR$" />
+    <orderEntry type="jdk" jdkName="Python 3.9 (PyCharmLearningProject)" jdkType="Python SDK" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>
\ No newline at end of file
diff --git a/.idea/inspectionProfiles/profiles_settings.xml b/.idea/inspectionProfiles/profiles_settings.xml
new file mode 100644
index 0000000..105ce2d
--- /dev/null
+++ b/.idea/inspectionProfiles/profiles_settings.xml
@@ -0,0 +1,6 @@
+<component name="InspectionProjectProfileManager">
+  <settings>
+    <option name="USE_PROJECT_PROFILE" value="false" />
+    <version value="1.0" />
+  </settings>
+</component>
\ No newline at end of file
diff --git a/.idea/misc.xml b/.idea/misc.xml
new file mode 100644
index 0000000..c063f29
--- /dev/null
+++ b/.idea/misc.xml
@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="Black">
+    <option name="sdkName" value="Python 3.9 (PyCharmLearningProject)" />
+  </component>
+  <component name="ProjectRootManager" version="2" project-jdk-name="Python 3.9 (PythonforCybersecurity-example)" project-jdk-type="Python SDK" />
+</project>
\ No newline at end of file
diff --git a/.idea/modules.xml b/.idea/modules.xml
new file mode 100644
index 0000000..2e2bf2c
--- /dev/null
+++ b/.idea/modules.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/.idea/PythonforCybersecurity-example.iml" filepath="$PROJECT_DIR$/.idea/PythonforCybersecurity-example.iml" />
+    </modules>
+  </component>
+</project>
\ No newline at end of file
diff --git a/.idea/vcs.xml b/.idea/vcs.xml
new file mode 100644
index 0000000..35eb1dd
--- /dev/null
+++ b/.idea/vcs.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="" vcs="Git" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/ShoppingList.txt b/ShoppingList.txt
index 27409dd..57cfe2e 100644
--- a/ShoppingList.txt
+++ b/ShoppingList.txt
@@ -2,4 +2,6 @@ Milk
 Break
 Bananas
 Eggs
-
+Apples
+Tomatoes
+Cake
\ No newline at end of file
diff --git a/end/CH02/HelloWorld.py b/end/CH02/HelloWorld.py
index 205893c..f33fdce 100755
--- a/end/CH02/HelloWorld.py
+++ b/end/CH02/HelloWorld.py
@@ -1,4 +1,6 @@
 #!/usr/bin/env python3
 # A simple "Hello World" script in python
-# Created by Ed Goad, 2/3/2021
-print("Hello World")
\ No newline at end of file
+# Created by Quentin Athula, 3/8/2025
+
+your_name = input("what is your name? ")
+print("Hello {0}".format(your_name))
diff --git a/end/CH02/HelloWorld2.py b/end/CH02/HelloWorld2.py
index 0dccc6c..1213c85 100755
--- a/end/CH02/HelloWorld2.py
+++ b/end/CH02/HelloWorld2.py
@@ -1,6 +1,11 @@
 #!/usr/bin/env python3
 # A simple "Hello World" script in python with Inputs
-# Created by Ed Goad, 2/3/2021
+# Created by Quentin Athula, 3/8/2025
 
 your_name = input("What is your name? ")
 print("Hello {0}".format(your_name))
+print(f"Hello {your_name}")
+print("Hello " + your_name)
+print("Hello", your_name)
+message = "Hello" + " " + your_name
+print(message)
diff --git a/end/CH02/SimpleCalculator.py b/end/CH02/SimpleCalculator.py
index 4580dc3..2d1380a 100755
--- a/end/CH02/SimpleCalculator.py
+++ b/end/CH02/SimpleCalculator.py
@@ -1,14 +1,14 @@
-#!/usr/bin/env python3
-# A simple calculator to show math and conditionals
-# Created by Ed Goad, 2/3/2021
+#!/user/bin/env python3
+# A simple calculator script in python
+# Created by Quentin Athula, 3/9/2025
 
-# Get inputs first
-# Note we are casting the numbers as "float", we could also do "int"
+# Get input from the user
+# Note we are casting the numbers as "float", we could also cast them as "int"
 first_num = float(input("What is the first number: "))
 activity = input("What activity? ( + - * / ) ")
 second_num = float(input("What is the second number: "))
 
-# depending on the selected activity, perform an action
+# depending on the selected activity, perform the calculation
 if activity == "+":
     print(first_num + second_num)
 if activity == "-":
@@ -17,3 +17,4 @@
     print(first_num * second_num)
 if activity == "/":
     print(first_num / second_num)
+
diff --git a/end/CH03/pinger1.py b/end/CH03/pinger1.py
index a21dab0..cbc514b 100755
--- a/end/CH03/pinger1.py
+++ b/end/CH03/pinger1.py
@@ -1,7 +1,7 @@
-#!/usr/bin/env python3
+#!/usr/bin/venv python3
 # First example of pinging from Python
-# By Ed Goad
-# 2/27/2021
+# By Quentin Athula
+# 3/15/2025
 
 # import necessary Python modules
 import platform
diff --git a/end/CH03/pinger2.py b/end/CH03/pinger2.py
index 17f4eed..f16d0b5 100755
--- a/end/CH03/pinger2.py
+++ b/end/CH03/pinger2.py
@@ -1,7 +1,7 @@
-#!/usr/bin/env python3
+#!/usr/bin/venv python3
 # Second example of pinging from Python
-# By Ed Goad
-# 2/27/2021
+# By Quentin Athula
+# 3/15/2025
 
 # import necessary Python modules
 import platform
@@ -9,11 +9,11 @@
 
 # Assign IP to ping to a variable
 ip = "127.0.0.1"
-# Determine the currrent OS
-currrent_os = platform.system().lower()
-if currrent_os == "windows":
-    # Build our ping command for Windows
-    ping_cmd = f"ping -n 1 -w 2 {ip} > nul"
+# Determine the current OS
+current_os = platform.system().lower()
+if current_os == "darwin":
+    # Build our ping command for darwin
+    ping_cmd = f"ping -n 1 -w 2 {ip} > /dev/null 2>&1"
 else:
     # Build our ping command for other OSs
     ping_cmd = f"ping -c 1 -w 2 {ip} > /dev/null 2>&1"
diff --git a/end/CH03/pinger3.py b/end/CH03/pinger3.py
index 4f4d141..60e18e9 100755
--- a/end/CH03/pinger3.py
+++ b/end/CH03/pinger3.py
@@ -1,7 +1,7 @@
 #!/usr/bin/env python3
 # Third example of pinging from Python
-# By Ed Goad
-# 2/27/2021
+# By Quentin Athula
+# 3/16/2025
 
 # import necessary Python modules
 import platform
@@ -9,14 +9,14 @@
 
 # Define the prefix to begin pinging
 ip_prefix = "192.168.0."
-# Determine the currrent OS
-currrent_os = platform.system().lower()
+# Determine the current OS
+current_os = platform.system().lower()
 # Loop from 0 - 254
 for final_octet in range(254):
     # Assign IP to ping to a variable
     # Adding 1 to final_octet because loop starts at 0
     ip = ip_prefix + str(final_octet + 1)
-    if currrent_os == "windows":
+    if current_os == "windows":
         # Build our ping command for Windows
         ping_cmd = f"ping -n 1 -w 2 {ip} > nul"
     else:
diff --git a/start/CH02/HelloWorld.py b/start/CH02/HelloWorld.py
index 88eb615..d39c824 100755
--- a/start/CH02/HelloWorld.py
+++ b/start/CH02/HelloWorld.py
@@ -1,3 +1,4 @@
-#!/usr/bin/env python3
+#!/usr/bin/.venv python3
 # A simple "Hello World" script in python
-# Created 
\ No newline at end of file
+# Created by Quentin Athula 3/16/2025
+print("hello world")
\ No newline at end of file
diff --git a/start/CH02/HelloWorld1.py b/start/CH02/HelloWorld1.py
new file mode 100644
index 0000000..532dd55
--- /dev/null
+++ b/start/CH02/HelloWorld1.py
@@ -0,0 +1,4 @@
+#!/user/bin/.venv/ python3
+# A sample "Check that the IDLE is working" script in python
+# Created by Quentin Athula 3/22/2025
+print("This is a sample to check that the IDE is working")
\ No newline at end of file
diff --git a/start/CH02/HelloWorld2.py b/start/CH02/HelloWorld2.py
index 1072d14..cacc939 100755
--- a/start/CH02/HelloWorld2.py
+++ b/start/CH02/HelloWorld2.py
@@ -1,7 +1,8 @@
 #!/usr/bin/env python3
 # A simple "Hello World" script in python with Inputs
-# Created 
+# Created by Quentin Athula 3/22/2025
+
+your_name = input("What is your name? ")
+print("Hello {0} ".format(your_name))
+
 
-# Suggestion, build out 1 line at a time
-# Once multiple print statemetns exist, put a breakpoint at first print line
-# Then walk through as an example of "debugging"
diff --git a/start/CH02/HelloWorld3.py b/start/CH02/HelloWorld3.py
index decd537..4b0b02f 100644
--- a/start/CH02/HelloWorld3.py
+++ b/start/CH02/HelloWorld3.py
@@ -1,3 +1,11 @@
 #!/usr/bin/env python3
 # A more complex "Hello World" script in python with Inputs
-# Created 
+# Created by Quentin Athula 3/22/2025
+
+your_name = input("What is your name? ")
+print("Hello {0} ".format(your_name))
+print(f"Hello {your_name}")
+print("Hello" + your_name)
+print("Hello", your_name)
+message = "Hello" + " " + your_name
+print(message)
diff --git a/start/CH03/pinger1.py b/start/CH03/pinger1.py
index 6af65f6..d4e5ba9 100755
--- a/start/CH03/pinger1.py
+++ b/start/CH03/pinger1.py
@@ -1,3 +1,17 @@
 #!/usr/bin/env python3
 # First example of pinging from Python
-# By 
\ No newline at end of file
+# By Quentin Athula
+# 4/22/2025
+
+# import necessary python modules
+import platform
+import os
+
+# Assign IP address to ping to a variable
+ip = "127.0.0.1"
+# Build the command to ping the IP address
+ping_cmd = f"ping -c 1 -w 2 {ip} > /dev/null 2>&1"
+# Execute command and capture exit code
+exit_code = os.system(ping_cmd)
+# print the result to the console
+print(exit_code)
\ No newline at end of file
diff --git a/start/CH03/pinger2.py b/start/CH03/pinger2.py
index c80c993..eda325a 100755
--- a/start/CH03/pinger2.py
+++ b/start/CH03/pinger2.py
@@ -1,3 +1,24 @@
-#!/usr/bin/env python3
-# Second example of pinging from Python
-# By 
\ No newline at end of file
+#!/user/bin/.venv/ python3
+# A second example of pinging from python
+# Created by Quentin athula
+# 4/22/2025
+
+# import necessary python modules
+import platform
+import os
+
+# Assign IP address to ping to a variable
+ip = "127.0.0.1"
+# Determine the current operating system
+current_os = platform.system() . lower()
+if current_os == "windows":
+    # Build our ping command for windows
+    ping_cmd = f"ping -n 1 -w 2 {ip} > nul"
+else:
+    # Build our ping command for other operating systems
+    ping_cmd = f"ping -c 1 -w 2 {ip} > /dev/null 2>&1"
+
+# Execute command and capture exit code
+exit_code = os.system(ping_cmd)
+# print the result to the console
+print(exit_code)
\ No newline at end of file
diff --git a/start/CH03/pinger3.py b/start/CH03/pinger3.py
index 8ca3629..618c7b3 100755
--- a/start/CH03/pinger3.py
+++ b/start/CH03/pinger3.py
@@ -1,3 +1,30 @@
-#!/usr/bin/env python3
+#!/user/bin/.vnv/ python3
 # Third example of pinging from Python
-# By 
\ No newline at end of file
+# By Quentin Athula
+# 4/22/2025
+
+# import necessary python modules
+import platform
+import os
+
+# Define a function to ping an IP address
+ip_prefix = "192.168.1."
+# determine the current operating system
+current_os = platform.system(). lower()
+# Loop from 0 - 254
+for final_octet in range(254):
+    # Assign IP to ping to a variable
+    # Adding 1 to final_octet because loop starts at 0
+    ip = ip_prefix + str(final_octet + 1)
+    if current_os == "windows":
+        # Build our ping command for windows
+        ping_cmd = f"ping -n 1 -w 2 {ip} > nul"
+    else:
+        # Build our ping command for other operating systems
+        ping_cmd = f"ping -c 1 -w 2 {ip} > /dev/null 2>&1"
+
+    # Execute command and capture exit code
+    exit_code = os.system(ping_cmd)
+    # print results to console only if successful
+    if exit_code == 0:
+        print("{0} is online" .format(ip))
diff --git a/start/CH03/pinger4.py b/start/CH03/pinger4.py
index 3d174a0..b622de8 100755
--- a/start/CH03/pinger4.py
+++ b/start/CH03/pinger4.py
@@ -1,3 +1,38 @@
 #!/usr/bin/env python3
 # Fourth example of pinging from Python
-# By 
\ No newline at end of file
+# By Quentin athula
+# 4/22/2025
+
+# import necessary python modules
+import platform
+import os
+
+def ping_host(ip):
+    # Determine the current operating system
+    current_os = platform.system().lower()
+    if current_os == "windows":
+        # Build our ping command for windows
+        ping_cmd = f"ping -n 1 -w 2 {ip} > nul"
+    else:
+        # Build our ping command for other operating systems
+        ping_cmd = f"ping -c 1 -w 2 {ip} > /dev/null 2>&1"
+
+    # Execute command and capture exit code
+    exit_code = os.system(ping_cmd)
+    return exit_code
+
+# Define the prefix to begin pinging
+ip_prefix = "192.168.1."
+
+# loop from 0 - 254
+for final_octet in range(254):
+    # Assign IP to ping to a variable
+    # Adding 1 to final_octet because loop starts at 0
+    ip = ip_prefix + str(final_octet + 1)
+
+    # call the ping_host function and capture the return value
+    exit_code = ping_host(ip)
+
+    # print results to console only if successful
+    if exit_code == 0:
+        print("{0} is online" .format(ip))