why does this code gets an "EOFerror: EOF when reading a line" on line 14?

Question

while True:
print("options: ")
print("enter add for addition")
print("enter sub to subtract")
print("enter multiply for multiplication")
print("enter divide for division")
print("enter exponential to elevate a number to other")
print("enter root to take square root of a number")

user_input = input(":")
if user_input == "quit":
break
elif user_input == "add":
num1=float(input("Enter a number:"))
num2=float(input("Enter another number:"))
result=str(num1 + num2)
print("The anwser is " + result)
elif user_input == "sub" :
num1=float(input("Enter a number:"))
num2=float(input("Enter another number:"))
result=str(num1 - num2)
print("The anwser is " + result)
elif user_input == "multiply":
num1 = float(input("Enter a number:"))
num2 = float(input("Enter another number:"))
result = str(num1 * num2)
print("The anwser is " + result)
elif user_input == "devide":
num1 = float(input("Enter a number:"))
num2 = float(input("Enter another number:"))
result = str(num1/num2)
print("The anwser is " + result)
elif user_input == "exponential":
num1 = float(input("Enter a number:"))
num2 = float(input("Enter another number:"))
result = str(num1 ** num2)
print("The anwser is " + result)
elif user_input == "root":
num1 = float(input("Enter a number:"))
num2 = float(1/2)
result = str(num1 ** num2)
print("The anwser is " + result)

Answer 1

https://code.sololearn.com/WhiNb9BkJUVC/?ref=app

Answer 2

thanks that's really helpful