Calculator

# Simple Calculator

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 "Error! Cannot divide by zero"
    return a / b

print("=== Simple Calculator ===")
print("1. Addition")
print("2. Subtraction")
print("3. Multiplication")
print("4. Division")

choice = input("Enter choice (1/2/3/4): ")
num1 = float(input("Enter first number: "))
num2 = float(input("Enter second number: "))

if choice == "1":
    print("Result:", add(num1, num2))
elif choice == "2":
    print("Result:", subtract(num1, num2))
elif choice == "3":
    print("Result:", multiply(num1, num2))
elif choice == "4":
    print("Result:", divide(num1, num2))
else:
    print("Invalid choice!")