diff --git a/lecture20261020/floats01.py b/lecture20261020/floats01.py
new file mode 100644
index 0000000..5fcfb72
--- /dev/null
+++ b/lecture20261020/floats01.py
@@ -0,0 +1,53 @@
+
+data1 = 6.
+data2 = 4.
+
+
+print("-------------Float addition")
+
+result = data1 + data2
+
+print("The value of data1 is ",data1)
+print("The value of data2 is ",data2)
+print("The value of result is ",result)
+
+print("The type of data1 is ",type(data1) )
+print("The type of data2 is ",type(data2) )
+print("The type of result is ",type(result) )
+
+print("-------------Float subtraction")
+
+result = data1 - data2
+
+print("The value of data1 is ",data1)
+print("The value of data2 is ",data2)
+print("The value of result is ",result)
+
+print("The type of data1 is ",type(data1) )
+print("The type of data2 is ",type(data2) )
+print("The type of result is ",type(result) )
+
+print("-------------Float multiplication")
+
+result = data1 * data2
+
+print("The value of data1 is ",data1)
+print("The value of data2 is ",data2)
+print("The value of result is ",result)
+
+print("The type of data1 is ",type(data1) )
+print("The type of data2 is ",type(data2) )
+print("The type of result is ",type(result) )
+
+print("-------------Float division")
+
+result = data1 / data2
+
+print("The value of data1 is ",data1)
+print("The value of data2 is ",data2)
+print("The value of result is ",result)
+
+print("The type of data1 is ",type(data1) )
+print("The type of data2 is ",type(data2) )
+print("The type of result is ",type(result) )
+
diff --git a/lecture20261020/floats02.py b/lecture20261020/floats02.py
new file mode 100644
index 0000000..17b65ac
--- /dev/null
+++ b/lecture20261020/floats02.py
@@ -0,0 +1,53 @@
+
+data1 = 6.
+data2 = 4
+
+
+print("-------------Float addition")
+
+result = data1 + data2
+
+print("The value of data1 is ",data1)
+print("The value of data2 is ",data2)
+print("The value of result is ",result)
+
+print("The type of data1 is ",type(data1) )
+print("The type of data2 is ",type(data2) )
+print("The type of result is ",type(result) )
+
+print("-------------Float subtraction")
+
+result = data1 - data2
+
+print("The value of data1 is ",data1)
+print("The value of data2 is ",data2)
+print("The value of result is ",result)
+
+print("The type of data1 is ",type(data1) )
+print("The type of data2 is ",type(data2) )
+print("The type of result is ",type(result) )
+
+print("-------------Float multiplication")
+
+result = data1 * data2
+
+print("The value of data1 is ",data1)
+print("The value of data2 is ",data2)
+print("The value of result is ",result)
+
+print("The type of data1 is ",type(data1) )
+print("The type of data2 is ",type(data2) )
+print("The type of result is ",type(result) )
+
+print("-------------Float division")
+
+result = data1 / data2
+
+print("The value of data1 is ",data1)
+print("The value of data2 is ",data2)
+print("The value of result is ",result)
+
+print("The type of data1 is ",type(data1) )
+print("The type of data2 is ",type(data2) )
+print("The type of result is ",type(result) )
+
diff --git a/lecture20261020/inputs01.py b/lecture20261020/inputs01.py
new file mode 100644
index 0000000..2c7e781
--- /dev/null
+++ b/lecture20261020/inputs01.py
@@ -0,0 +1,18 @@
+
+data1 = input("Enter a value for data1 ")
+data1 = float(data1)
+
+data2 = float( input("Enter a value for data2 ") )
+
+
+print("The value of data1 is ",data1)
+print("The value of data2 is ",data2)
+
+
+print("The type of data1 is ",type(data1) )
+print("The type of data2 is ",type(data2) )
+
+
+result = data1 * data2
+
+print(result)
\ No newline at end of file
diff --git a/lecture20261020/ints01.py b/lecture20261020/ints01.py
new file mode 100644
index 0000000..b2aa10e
--- /dev/null
+++ b/lecture20261020/ints01.py
@@ -0,0 +1,13 @@
+
+data1 = 6
+Data1 = 11
+DATA1 = 22
+
+print("The value of data1 is ",data1)
+print("The value of Data1 is ",Data1)
+print("The value of DATA1 is ",DATA1)
+
+print("The type of data1 is ",type(data1) )
+print("The type of Data1 is ",type(Data1) )
+print("The type of DATA1 is ",type(DATA1) )
+
diff --git a/lecture20261020/ints02.py b/lecture20261020/ints02.py
new file mode 100644
index 0000000..c2ed652
--- /dev/null
+++ b/lecture20261020/ints02.py
@@ -0,0 +1,54 @@
+
+data1 = 6
+data2 = 4
+
+
+print("-------------Integer addition")
+
+result = data1 + data2
+
+print("The value of data1 is ",data1)
+print("The value of data2 is ",data2)
+print("The value of result is ",result)
+
+print("The type of data1 is ",type(data1) )
+print("The type of data2 is ",type(data2) )
+print("The type of result is ",type(result) )
+
+print("-------------Integer subtraction")
+
+result = data1 - data2
+
+print("The value of data1 is ",data1)
+print("The value of data2 is ",data2)
+print("The value of result is ",result)
+
+print("The type of data1 is ",type(data1) )
+print("The type of data2 is ",type(data2) )
+print("The type of result is ",type(result) )
+
+print("-------------Integer multiplication")
+
+result = data1 * data2
+
+print("The value of data1 is ",data1)
+print("The value of data2 is ",data2)
+print("The value of result is ",result)
+
+print("The type of data1 is ",type(data1) )
+print("The type of data2 is ",type(data2) )
+print("The type of result is ",type(result) )
+
+print("-------------Integer division")
+
+result = data1 / data2
+result1 = int(result)
+
+print("The value of data1 is ",data1)
+print("The value of data2 is ",data2)
+print("The value of result is ",result)
+
+print("The type of data1 is ",type(data1) )
+print("The type of data2 is ",type(data2) )
+print("The type of result is ",type(result) )
+print("The type of result1 is ",type(result1) )
diff --git a/lecture20261020/mixed01.py b/lecture20261020/mixed01.py
new file mode 100644
index 0000000..334597b
--- /dev/null
+++ b/lecture20261020/mixed01.py
@@ -0,0 +1,53 @@
+
+data1 = 6
+data2 = 4.
+
+
+print("-------------Float addition")
+
+result = data1 + data2
+
+print("The value of data1 is ",data1)
+print("The value of data2 is ",data2)
+print("The value of result is ",result)
+
+print("The type of data1 is ",type(data1) )
+print("The type of data2 is ",type(data2) )
+print("The type of result is ",type(result) )
+
+print("-------------Float subtraction")
+
+result = data1 - data2
+
+print("The value of data1 is ",data1)
+print("The value of data2 is ",data2)
+print("The value of result is ",result)
+
+print("The type of data1 is ",type(data1) )
+print("The type of data2 is ",type(data2) )
+print("The type of result is ",type(result) )
+
+print("-------------Float multiplication")
+
+result = data1 * data2
+
+print("The value of data1 is ",data1)
+print("The value of data2 is ",data2)
+print("The value of result is ",result)
+
+print("The type of data1 is ",type(data1) )
+print("The type of data2 is ",type(data2) )
+print("The type of result is ",type(result) )
+
+print("-------------Float division")
+
+result = data1 / data2
+
+print("The value of data1 is ",data1)
+print("The value of data2 is ",data2)
+print("The value of result is ",result)
+
+print("The type of data1 is ",type(data1) )
+print("The type of data2 is ",type(data2) )
+print("The type of result is ",type(result) )
+
diff --git a/lecture20261020/outputs01.py b/lecture20261020/outputs01.py
new file mode 100644
index 0000000..6d2d7f3
--- /dev/null
+++ b/lecture20261020/outputs01.py
@@ -0,0 +1,27 @@
+
+data1 = input("Enter a value for data1 ")
+data1 = float(data1)
+
+data2 = float( input("Enter a value for data2 ") )
+
+
+print("The value of data1 is ",data1)
+print("The value of data2 is ",data2)
+
+
+print("The type of data1 is ",type(data1) )
+print("The type of data2 is ",type(data2) )
+
+
+result = data1 + data2
+
+print(result)
+
+print("The result is ",result)
+# Wrong -- forgot braces
+print(f"The result is result")
+
+print(f"The result is {result}")
+print(f"The result is {result:.2f}")
+print(f"The result is ${result:.2f}")
+
diff --git a/lecture20261020/squareroot.py b/lecture20261020/squareroot.py
new file mode 100644
index 0000000..8a0b933
--- /dev/null
+++ b/lecture20261020/squareroot.py
@@ -0,0 +1,11 @@
+import math
+#
+data1 = float(input("Enter a number: "))
+
+result = math.sqrt(data1)
+
+print(f"result = {result:f}  ")
+
+result2 = result ** 2
+print(f"square of result2 = {result2:.42f}  ")
+
diff --git a/lecture20261020/strings01.py b/lecture20261020/strings01.py
new file mode 100644
index 0000000..fefbb00
--- /dev/null
+++ b/lecture20261020/strings01.py
@@ -0,0 +1,24 @@
+
+message1 = "This is a sample message string."
+
+message2= 'This is another sample message string.'
+
+multiLineMessage = '''This is a long paragraph
+of text to
+display
+'''
+
+print("message1 ")
+print(type(message1))
+print(message1)
+
+print("message2 ")
+print(type(message2))
+print(message2)
+
+print("multiLineMessage ")
+print(type(multiLineMessage))
+print(multiLineMessage)
+
+
+
diff --git a/lecture20261020/strings02.py b/lecture20261020/strings02.py
new file mode 100644
index 0000000..605697a
--- /dev/null
+++ b/lecture20261020/strings02.py
@@ -0,0 +1,21 @@
+
+message1 = "This is a sample message string."
+
+message2= 'This is another sample message string.'
+
+multiLineMessage = '''This is a long paragraph
+of text to
+display
+'''
+
+print("message1 ")
+print(type(message1), len(message1))
+print(message1)
+
+print("message2 ")
+print(type(message2),len(message2))
+print(message2)
+
+print("multiLineMessage ")
+print(type(multiLineMessage),len(multiLineMessage))
+print(multiLineMessage)
\ No newline at end of file
diff --git a/lecture20261020/strings03.py b/lecture20261020/strings03.py
new file mode 100644
index 0000000..2d14e30
--- /dev/null
+++ b/lecture20261020/strings03.py
@@ -0,0 +1,67 @@
+
+message1 = "This is a sample message string."
+
+message2= 'This is another sample message string.'
+
+multiLineMessage = '''This is a long paragraph
+of text to
+display
+'''
+
+msg = message1 + message2
+
+print("message1 ")
+print(type(message1), len(message1))
+print(message1)
+
+print("message2 ")
+print(type(message2),len(message2))
+print(message2)
+
+print("msg ")
+print(type(msg),len(msg))
+print(msg)
+
+msg = message1 + " " + message2
+
+print("message1 ")
+print(type(message1), len(message1))
+print(message1)
+
+print("message2 ")
+print(type(message2),len(message2))
+print(message2)
+
+print("msg ")
+print(type(msg),len(msg))
+print(msg)
+
+print("\n")
+
+
+msg = message1 * 3
+
+print("message1 ")
+print(type(message1), len(message1))
+print(message1)
+
+print("message2 ")
+print(type(message2),len(message2))
+print(message2)
+
+print("msg ")
+print(type(msg),len(msg))
+print(msg)
+
+borderStars = "*" * 60
+print(borderStars)
+
+borderMain = "*" + " " * 58 + "*"
+print(borderMain)
+print(borderMain)
+print(borderMain)
+print(borderMain)
+print(borderMain)
+
+print(borderStars)
+
diff --git a/lecture20261020/strings04.py b/lecture20261020/strings04.py
new file mode 100644
index 0000000..f859cbd
--- /dev/null
+++ b/lecture20261020/strings04.py
@@ -0,0 +1,29 @@
+
+data1 = "6"
+data2 = 4
+
+
+print("The value of data1 is ",data1)
+print("The value of data2 is ",data2)
+
+
+print("The type of data1 is ",type(data1) )
+print("The type of data2 is ",type(data2) )
+
+# Generates an error
+#result = data1 + data2
+
+# Works as long as data1 can be converted to an integer
+result = int(data1) + data2
+
+# Works as long as you want string concatenation
+#result = data1 + str(data2)
+
+print(result)
+
+result = int(data1) + data2
+
+# Works as long as you want string concatenation
+result = data1 + str(data2)
+
+print(result)