diff --git a/lecture20261027/if01.py b/lecture20261027/if01.py
new file mode 100644
index 0000000..76d2d55
--- /dev/null
+++ b/lecture20261027/if01.py
@@ -0,0 +1,13 @@
+
+
+# Inputs to the program
+length = input("Enter a value for the Length ")
+length = float(length)
+
+if length <= 0:
+    print("Length cannot be negative or zero.")
+    print("Program terminates here\n")
+    exit()
+
+print(f"length = {length}")
+
diff --git a/lecture20261027/if02.py b/lecture20261027/if02.py
new file mode 100644
index 0000000..f55d808
--- /dev/null
+++ b/lecture20261027/if02.py
@@ -0,0 +1,17 @@
+
+print("\nThis program demonstrate if statement\n")
+
+data1 = 7
+data2 = 3
+
+print(f"data1 = {data1}, data2 = {data2}")
+
+if data1 == data2:
+    print("data1 == data2")
+
+if data1 >= data2:
+    print("data1 >= data2")
+
+if data1 != data2:
+    print("data1 != data2")
+
diff --git a/lecture20261027/if03_nested.py b/lecture20261027/if03_nested.py
new file mode 100644
index 0000000..f4b4f55
--- /dev/null
+++ b/lecture20261027/if03_nested.py
@@ -0,0 +1,23 @@
+
+print("\nThis program demonstrate nest if\n")
+print("Insure both values > 0, but the logic fails")
+
+data1 = 7
+data2 = 0
+
+print(f"data1 = {data1}, data2 = {data2}")
+
+if data1 <= 0:
+    print("data1 is less than or equal to zero")
+    if data2 <= 0:
+        print("data2 is less than or equal to zero")
+        exit()
+    exit()
+
+print("Done")
+
+
+
+
+
+
diff --git a/lecture20261027/if03_nested_1.py b/lecture20261027/if03_nested_1.py
new file mode 100644
index 0000000..a116f75
--- /dev/null
+++ b/lecture20261027/if03_nested_1.py
@@ -0,0 +1,24 @@
+
+print("\nThis program demonstrate nest if\n")
+print("Insure both values > 0, but the logic works as two separate ifs")
+
+data1 = 7
+data2 = 0
+
+print(f"data1 = {data1}, data2 = {data2}")
+
+if data1 <= 0:
+    print("data1 is less than or equal to zero")
+    exit()
+
+if data2 <= 0:
+    print("data2 is less than or equal to zero")
+    exit()
+
+print("Done")
+
+
+
+
+
+
diff --git a/lecture20261027/if03_nested_2.py b/lecture20261027/if03_nested_2.py
new file mode 100644
index 0000000..2613135
--- /dev/null
+++ b/lecture20261027/if03_nested_2.py
@@ -0,0 +1,22 @@
+
+print("\nThis program demonstrate nest if\n")
+print("Insure both values > 0, preferred method")
+
+data1 = 7
+data2 = 3
+
+print(f"data1 = {data1}, data2 = {data2}")
+
+if data1 <= 0 or data2 <=0:
+    print("ERROR: data1 and data2 must greater than zero")
+    exit()
+
+
+
+print("Done")
+
+
+
+
+
+
diff --git a/lecture20261027/logic01.py b/lecture20261027/logic01.py
new file mode 100644
index 0000000..82664c4
--- /dev/null
+++ b/lecture20261027/logic01.py
@@ -0,0 +1,25 @@
+
+print("\nThis program displays logic values\n")
+
+data1 = 7
+data2 = 3
+data3 = data2
+
+
+print(f"{data1} > {data2} = {data1 > data2}")
+print(f"{data1} >= {data2} = {data1 >= data2}")
+print(f"{data1} < {data2} = {data1 < data2}")
+print(f"{data1} <= {data2} = {data1 <= data2}")
+print(f"{data1} == {data2} = {data1 == data2}")
+print(f"{data1} != {data2} = {data1 != data2}")
+
+print()
+
+print(f"{data3} > {data2} = {data3 > data2}")
+print(f"{data3} >= {data2} = {data3 >= data2}")
+print(f"{data3} < {data2} = {data3 < data2}")
+print(f"{data3} <= {data2} = {data3 <= data2}")
+print(f"{data3} == {data2} = {data3 == data2}")
+print(f"{data3} != {data2} = {data3 != data2}")
+
+
diff --git a/lecture20261027/rectangle2.py b/lecture20261027/rectangle2.py
new file mode 100644
index 0000000..ac8843b
--- /dev/null
+++ b/lecture20261027/rectangle2.py
@@ -0,0 +1,28 @@
+
+
+print("\nA Program to calculate the area of a rectangle \n")
+# Inputs to the program
+length = input("Enter a value for the Length ")
+length = float(length)
+
+if length <= 0:
+    print("Length cannot be negative or zero.")
+    print("Program terminates here\n")
+    exit()
+
+
+width = input("Enter a value for the width ")
+width = float(width)
+
+if width <= 0:
+    print("Width cannot be negative or zero.")
+    print("Program terminates here\n")
+    exit()
+
+
+# Calculation or process the data
+
+area = length * width
+
+# Output results
+print(f"The area is {area}")