def add(x,y):
    return x+y
def sub(x,y):
    return x-y
def multi(x,y):  
    return x*y

print("selelct operation")
print("1.Add")
print("2,Subtract")
print("3, mult")

choice = input("Enter choice(1/2/3):")

num1 = int(input("Enter first number:"))
num2 = int(input("Enter second number:"))

if choice =='1':
    print(num1, "+", num2,"=", add(num1,num2))
elif choice =='2':
    print(num1,"-",num2,"=", sub(num1,num2))
elif choice =='3':
    print(num1, "*",num2,"=", multi(num1,num2))
else:
    print("Invalid Input")         



 