{}
while True:
try:
num1 = float(input("Enter first number: "))
op = input("Enter operation (+, -, *, /): ")
num2 = float(input("Enter second number: "))
if op == '+':
print("Result:", num1 + num2)
elif op == '-':
print("Result:", num1 - num2)
elif op == '*':
print("Result:", num1 * num2)
elif op == '/':
print("Result:", num1 / num2 if num2 != 0 else "❌ Cannot divide by zero!")
else:
print("❌ Invalid operation!")
except ValueError:
print("❌ Invalid input!")