Thinking...
Okay, I need to write a Python function called is_palindrome that checks if
if a string is a palindrome. A palindrome is a string that reads the same f
forwards and backwards. So, for example, "madam" is a palindrome because re
reversed it's still "madam".
First, I think about how to reverse the string. In Python, slicing can be u
used. So if I have the string s, reversing it would be s[::-1]. Then
compare the original string to the reversed one.
Wait, but what about cases where the string is empty or has only one
character? Well, those are trivially palindromes. The function should
return True in those cases as well.
So the steps are: take the input string s. Reverse it using slicing.
Compare the reversed string to the original. If they are the same, return T
True; else, False.
But wait, what about leading or trailing spaces? Like, if the input is
"racecar ", then reversing it would give "racecar ", which is different
from the original. So the function should handle that correctly. The
problem statement doesn't mention anything about ignoring spaces or case, s
so I should assume that the input is as given, and the function should
check exactly as per the string.
So the function is straightforward. Let me test some examples.
Test case 1: s = "madam" → reversed is "madam" → True.
Test case 2: s = "hello" → reversed is "olleh" → False.
Test case 3: s = "a" → True.
Test case 4: s = "" → True.
So the function should work.
Now, code-wise, the function would be:
def is_palindrome(s):
return s == s[::-1]
Yes, that's simple. But wait, what about the case where s is empty? Well, e
empty string is considered a palindrome. So the code handles that.
But maybe the problem expects some edge cases. For example, if the input is
is None? But the problem says "One test case", so maybe the input is a
string, and the function is called with a string. So the code should work.
So the function is as simple as that. Let me write it.
...done thinking.
To determine whether a given string is a **palindrome**, we need to check i
if the string reads the same forwards and backwards. A straightforward and
efficient way to do this in Python is by comparing the string to its
reverse using slicing.
---
### ✅ Key Points:
- A **palindrome** is a string that is the same when reversed.
- The function should return `True` if the string is a palindrome, and
`False` otherwise.
- The function should handle all valid string inputs, including empty
strings, single-character strings, and strings with spaces or other
characters.
---
### 🧠 Approach:
We can reverse the string using slicing `s[::-1]`, and then compare it to t
the original string. If they are equal, the string is a palindrome.
---
### 🧪 Example Usage:
```python
print(is_palindrome("madam")) # True
print(is_palindrome("hello")) # False
print(is_palindrome("a")) # True
print(is_palindrome("")) # True
print(is_palindrome("racecar")) # True
```
---
### 📦 Final Implementation:
```python
def is_palindrome(s):
return s == s[::-1]
```
This function is efficient, concise, and handles all standard cases
correctly.