Create app.py

app.py

@@ -0,0 +1,59 @@
+# calculator.py
+
+def add(x, y):
+    """Adds two numbers."""
+    return x + y
+
+def subtract(x, y):
+    """Subtracts two numbers."""
+    return x - y
+
+def multiply(x, y):
+    """Multiplies two numbers."""
+    return x * y
+
+def divide(x, y):
+    """Divides two numbers. Handles division by zero."""
+    if y == 0:
+        return "Error! Division by zero."
+    return x / y
+
+def main_calculator():
+    """Main function to run the interactive calculator."""
+    print("Welcome to the Simple Python Calculator!")
+    print("Select operation:")
+    print("1. Add")
+    print("2. Subtract")
+    print("3. Multiply")
+    print("4. Divide")
+    print("5. Exit")
+
+    while True:
+        choice = input("Enter choice(1/2/3/4/5): ")
+
+        if choice in ('1', '2', '3', '4'):
+            try:
+                num1 = float(input("Enter first number: "))
+                num2 = float(input("Enter second number: "))
+            except ValueError:
+                print("Invalid input. Please enter numbers only.")
+                continue
+
+            if choice == '1':
+                print(f"{num1} + {num2} = {add(num1, num2)}")
+            elif choice == '2':
+                print(f"{num1} - {num2} = {subtract(num1, num2)}")
+            elif choice == '3':
+                print(f"{num1} * {num2} = {multiply(num1, num2)}")
+            elif choice == '4':
+                result = divide(num1, num2)
+                print(f"{num1} / {num2} = {result}")
+        elif choice == '5':
+            print("Exiting calculator. Goodbye!")
+            break
+        else:
+            print("Invalid input. Please enter a valid choice (1/2/3/4/5).")
+        print("-" * 30) # Separator for next operation
+
+if __name__ == "__main__":
+    main_calculator()