python: classes 1

Author: victorpreston

introduction/README.md

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+# Calculator

introduction/calculator.py

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+#Inputs - accept data from the user
+#User will choose the desired operation
+#Operation - perform the operation
+#Output - display the result to the user
+
+
+def calculator():
+     print("Welcome to the calculator.")
+     print("Select operation: ")
+
+     print("1. Addition (+)")
+     print("2. Subtraction (-)")
+     print("3. Multiplication (*)")
+     print("4. Division (/)")
+
+     choice =  input("Enter choice (1/2/3/4): ") #variable
+
+     if choice in ('1', '2', '3', '4'):
+          num1 = float(input("Enter first number: "))
+          num2 = float(input("Enter second number: "))
+
+          if choice == '1':
+               result = num1 + num2
+               operation = 'Addition'
+          elif choice == '2':
+               result = num1 - num2
+               operation = 'Subtraction'
+          elif choice == '3':
+               result = num1 * num2
+               operation = 'Multiplication'
+          elif choice == '4':
+               if num2 == 0:
+                    print("Error: Division by zero")
+                    return
+               result = num1 / num2
+               operation = 'Division'
+          print(f"{operation} of {num1} and {num2} is {result}")
+     else:
+          print("Select a valid operation.")
+
+
+#Run the calculator function
+calculator()
+
+# PS D:\Python-Classes\introduction> python3 calculator.py
+# Welcome to the calculator.
+# Select operation: 
+# 1. Addition (+)
+# 2. Subtraction (-)
+# 3. Multiplication (*)
+# 4. Division (/)
+# Enter choice (1/2/3/4): 1
+# Enter first number: 30
+# Enter second number: 45
+# Addition of 30.0 and 45.0 is 75.0
+# PS D:\Python-Classes\introduction> 

introduction/intro.py

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+print("Tell them am here")
+
+x = 1 #variable x is assigned the value 1
+print(x)
+
+if x > 1:
+    print("x is greater than 1.")
+else:
+    x = 1
+    print("x is equal to 1.")
+
+############################### Data types
+# Strings - text
+# integers - whole numbers
+# floats - decimal numbers
+# booleans - True or False
+# lists - ordered collection of items "[1, 2, 3]"
+# tuples - ordered collection of items that cannot be changed "(1, 2, 3)"
+# dictionaries - unordered collection of items in key:value pairs "{key: value}"
+# sets - unordered collection of unique items "{1, 2, 3}": subset, superset, union, intersection, difference.
+
+# Strings
+def print_name():
+    name = "John"
+    print("Your name is", name)
+
+print_name() # function call
+
+
+def sum():
+    a = 5
+    b = 3
+    print(a + b)
+
+sum() # function call
+
+# Integers
+age = 25
+
+if age >= 18:
+    print(age, ",You are an adult.")
+else:
+    print(age, "You are a minor.")
+
+# Floats
+height = 5.9
+print("Your height is", height)

introduction/lists.py

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+mylist = [1, 2, 3, 4, 5]
+print(mylist)
+
+age = [] #Age of  students
+age.append(25)
+age.append(30)
+age.append(35)
+age.append(40)
+
+print(age[0])
+print(age[1])
+print(age[2])
+print(age[3])
+
+print(age)
+names = ["John", "Jane", "Doe"]
+
+print(names[0])
+
+
+for i in names:
+    print(i)