def whileDemo(n):
    number = 1 # set the value you will test
    while number <= n: # test the value
        print(number)
        number += 1  # update the value
def whileDemo2(n):
    for number in range(1,n+1):
        print(number)

def printLetters(word):
    for letter in word:
        print(letter)

def plainFor():
    for symbol in ["a", "b", "c"]:
        print(symbol)

def reverse(word):
    result = ""
    for char in word:
        result = char + result
    return result


def reverse2(word):
    result = ""
    lastPosition = len(word)-1
    while lastPosition >= 0:
        result = result + word[lastPosition]
        lastPosition = lastPosition - 1
        # print(result)
    return result

def reverse3(word):
    if word == "":
        return ""
    else:
        return reverse3(word[1:]) + word[0]

def palindrome():
    word = input("enter some text ")
    if word == reverse(word):
        print("You entered a palindrome!")
    else:
        print("You did not enter a palindrome.")

def palindrome2():
    word = input("enter some text ")
    if isPalindrome(word):
        print("You entered a palindrome!")
    else:
        print("You did not enter a palindrome.")

def isPalindrome(word):
    length = len(word)
    n = 0
    if length <= 1:
        return True
    for x in range(length/2+1):
        if word[length-1] != word[n]:
            return False
        n += 1
        length = length - 1
    return True