Find Odd Palindromes Between a Range of Numbers in Python

When it is required to find all the numbers that are odd, and are palindromes and lie between a given range of values, and it has been told that recursion can’t be used, then, list comprehension, and ‘%’ operator can be used to achieve the same.

Palindromes are string that are same when they are read in either way- left to right and right to left.

Below is a demonstration for the same −

Example

 Live Demo

my_list = []
lower_limit = 5
upper_limit = 189
print("The lower limit is : ")
print(lower_limit)
print("The upper limit is : ")
print(upper_limit)
my_list = [x for x in range(lower_limit,upper_limit+1) if x%2!=0 and str(x)==str(x)[::-1]]
print("The numbers which are odd and palindromes between " + str(lower_limit) + " and " + str(upper_limit) + " are : ")
print(my_list)

Output

The lower limit is :
5
The upper limit is :
189
The numbers which are odd and palindromes between 5 and 189 are :
[5, 7, 9, 11, 33, 55, 77, 99, 101, 111, 121, 131, 141, 151, 161, 171, 181]

Explanation

• An empty list, a lower limit and an upper limit is defined.
• The upper and lower limit are displayed on the console.
• The values between upper and lower limit are iterated over, and checked to see if it is divisible by 2.
• Then, it is converted to a string, and elements from the end of the string and the string are compared.
• This is assigned to a variable.
• This is displayed as output on the console.