Create simple calculator.py

Python/simple calculator.py

@@ -0,0 +1,46 @@
+def add(x, y):
+    return x + y
+
+def subtract(x, y):
+    return x - y
+
+def multiply(x, y):
+    return x * y
+
+def divide(x, y):
+    if y == 0:
+        return "Error! Division by zero."
+    return x / y
+
+def calculator():
+    print("Select operation:")
+    print("1. Add")
+    print("2. Subtract")
+    print("3. Multiply")
+    print("4. Divide")
+
+    while True:
+        choice = input("Enter choice (1/2/3/4): ")
+
+        if choice in {'1', '2', '3', '4'}:
+            num1 = float(input("Enter first number: "))
+            num2 = float(input("Enter second number: "))
+
+            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':
+                print(f"{num1} / {num2} = {divide(num1, num2)}")
+        else:
+            print("Invalid input")
+
+        next_calculation = input("Do you want to perform another calculation? (yes/no): ")
+        if next_calculation.lower() != 'yes':
+            break
+
+# Example usage
+if __name__ == "__main__":
+    calculator()