Here are five Python programs to check whether a number is a palindrome or not:
### 1. Using String Reversal:
```python
# Program 1: Checking if a number is a palindrome using string reversal
def is_palindrome(num):
num_str = str(num)
return num_str == num_str[::-1]
number = 12321
print(f"{number} is a palindrome:", is_palindrome(number))
```
### 2. Using Loop:
```python
# Program 2: Checking if a number is a palindrome using loop
def is_palindrome(num):
num_str = str(num)
length = len(num_str)
for i in range(length // 2):
if num_str[i] != num_str[length - i - 1]:
return False
return True
number = 12321
print(f"{number} is a palindrome:", is_palindrome(number))
```
### 3. Using Recursion:
```python
# Program 3: Checking if a number is a palindrome using recursion
def is_palindrome(num):
num_str = str(num)
if len(num_str) <= 1:
return True
if num_str[0] != num_str[-1]:
return False
return is_palindrome(num_str[1:-1])
number = 12321
print(f"{number} is a palindrome:", is_palindrome(number))
```
### 4. Using Conversion to Reversed Integer:
```python
# Program 4: Checking if a number is a palindrome using conversion to reversed integer
def is_palindrome(num):
original_num = num
reversed_num = 0
while num > 0:
reversed_num = reversed_num * 10 + num % 10
num //= 10
return original_num == reversed_num
number = 12321
print(f"{number} is a palindrome:", is_palindrome(number))
```
### 5. Using Modulus and Division:
```python
# Program 5: Checking if a number is a palindrome using modulus and division
def is_palindrome(num):
original_num = num
reversed_num = 0
while num > 0:
digit = num % 10
reversed_num = reversed_num * 10 + digit
num //= 10
return original_num == reversed_num
number = 12321
print(f"{number} is a palindrome:", is_palindrome(number))
```
These programs check whether the input number (in this case, 12321) is a palindrome using different approaches - string reversal, loop, recursion, conversion to reversed integer, and modulus and division. Feel free to replace the `number` variable with any desired number to check if it's a palindrome.
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