Previously we have developed many python programs based on Prime numbers. Now in this post, we will develop a palindrome number in python. It will check the given number is a palindrome number or not.

**Palindrome number:- If the Reverse of a number is equal to the same number then the number is called a palindrome number.**

Example of palindrome number:-**5225** = 5225 So, 5225 is a palindrome number.

123 != 321 So, 123 is **not** a palindrome number.

This program completely depends on the program to find the reverse of a number. After finding the reverse of a number compare the result and the actual number if both are the same then the given number is a palindrome number else the number is not a palindrome number.

Prerequisite:- Python program to find reverse of a number

## Palindrome Program in Python

This python program using the **while loop** to check number is palindrome or not. We will take integer numbers while declaring the variables. Then, find the reverse of a number using the while loop and check number is equal to the reverse number or not using the **if-else statement**. Finally, the result will be displayed on the screen.

```
# Python program to check if number is Palindrome
# take inputs
num = int(input('Enter the number : '))
# calculate reverse of number
reverse = 0
number = num
while(num != 0):
remainder = num % 10
reverse = reverse * 10 + remainder
num = int(num / 10)
# compare reverse to original number
if(number == reverse):
print(number,'is a Palindrome')
else:
print(number,'is not a Palindrome')
```

Output for the different input values:-

Enter the number: 121

121 is a Palindrome

Enter the number: 123

123 is not a Palindrome

## Palindrome Program in Python using Recursion

We can also use the **recursion** technique to check if a number is palindrome or not in Python. A technique of defining the method/function that contains a call to itself is called **recursion**.

```
# Python program to check if number is Palindrome using recursion
reverse, base = 0, 1
def findReverse(n):
global reverse #function definition
global base #function definition
if(n > 0):
findReverse((int)(n/10))
reverse += (n % 10) * base
base *= 10
return reverse
# take inputs
num = int(input('Enter the number: '))
# calling function and display result
reverse = findReverse(num)
if(num == reverse):
print(num,'is a Palindrome')
else:
print(num,'is not a Palindrome')
```

Output:-

Enter the number: 12345

12345 is not a Palindrome

## Python Program using Slicing

We read a number and reverse a number using **slice operations**. We will convert the integer number to string using **str()** and then, calculate the reverse of a number using the **slicing operation**.

**Syntax of slicing operation**:- str(num) [::-1]

```
# Python program to check if number is Palindrome using slicing
# take inputs
num = int(input('Enter the number: '))
# calculate reverse of number
reverse = int(str(num)[::-1])
# compare reverse to original number
if(num == reverse):
print(num,'is a Palindrome')
else:
print(num,'is not a Palindrome')
```

Output:-

Enter the number: 7542457

7542457 is a Palindrome

We can also read input as string and then simply check for palindrome.

```
num = input('Enter the number: ')
if(num == num[::-1]):
print(num,'is a Palindrome')
else:
print(num,'is not a Palindrome')
```

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