Untitled

def add(x,y):
    return x+y
def sub(x,y):
    return x-y
def mul(x,y):
    return x*y
def div(x,y):
    return x/y

print("1. ADDITION \n2. SUBTRACTION \n2. MULTIPLY \n2. DIVISION")

while True:
    choice = int(input("Enter choice:"))
    if(choice in (1,2,3,4)):
        try:
            num1 = float(input("Enter num1:"))
            num2 = float(input("Enter num2:"))
        except ValueError:
            print("Error ocured")
            continue

        if(choice == 1):
            print("Sum :", add(num1,num2))
        
        elif(choice == 2):
            print("subtraction :", sub(num1,num2))
        
        elif(choice == 3):
            print("Muliply :", mul(num1,num2))
        
        elif(choice == 4):
            print("Division :", div(num1,num2))

        next = input("Ener choice:(yes/no)")
        if(next=="yes"):
            continue
        else:
            break
    else:
        print("invalid input")