how do you make an application that will calculate a fabonac

how do you make an application that will calculate a fabonacci number with a given input. Give the user the choice of 25, 50, 75, 100 runs

Solution

def fibonacci(n):
   \"\"\"Recursive function to
   print Fibonacci sequence\"\"\"
   if n <= 1:
       return n
   else:
       return(fibonacci(n-1) + fibonacci(n-2))

choice = input(\"Enter number among 25, 50, 75, 100 to find fibonacci: \")
if choice==25 or choice==50 or choice==75 or choice==100:
   print fibonacci(choice)

else:
   print \"Invalid input.\"