my new nada program

quickstart/client_code/run_my_first_program.py

@@ -0,0 +1,42 @@
+def add(a, b):
+    return a + b
+
+def subtract(a, b):
+    return a - b
+
+def multiply(a, b):
+    return a * b
+
+def divide(a, b):
+    if b != 0:
+        return a / b
+    else:
+        return "Error! Division by zero."
+
+def calculator():
+    print("Select operation:")
+    print("1. Addition")
+    print("2. Subtraction")
+    print("3. Multiplication")
+    print("4. Division")
+
+    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: "))
+
+        operations = {
+            '1': add,
+            '2': subtract,
+            '3': multiply,
+            '4': divide
+        }
+
+        result = operations[choice](num1, num2)
+        print(f"The result is: {result}")
+    else:
+        print("Invalid input")
+
+if __name__ == "__main__":
+    calculator()