import math
import pandas as pd
def int_check(question, low, high):

    error = f"Oops - please enter an number that is higher or equal to {low} and lower or equal to {high} ."

    while True:

        try:
            response = float(input(question))

            if low <= response <= high:
                return response

            else:
                print(error)

        except ValueError:
            print(error)
def string_check(question, valid_ans_list, num_letters):
    """Checks that users enter the full word
    or the 'n' letter/s of a word from a list of valid responses"""

    while True:

        response = input(question).lower()

        for item in valid_ans_list:
            if response == item:
                return item

            elif response == item[:num_letters]:
                return item
        print(f"Please choose an option from the list {valid_ans_list}")

data_list = []
radius = int_check("Enter radius: ", 0.1, 100)


circumference = 2 * math.pi * radius
area = math.pi * radius * radius
circumference_round = round(circumference, 2)
area_round = round(area, 2)
data_list.append({"Circumference": circumference_round, "Area": area_round})

df = pd.DataFrame(data_list)
print(df)