🧪 Programming
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🔧 Q4_0
Prompt: Write a Python function is_palindrome(s) that returns True if s is a palindrome. One test case.
Response
```python
def is_palindrome(s):
"""Checks if a string is a palindrome.
Args:
s: The string to check.
Returns:
True if the string is a palindrome, False otherwise.
"""
return s == s[::-1]
# Test case
test_string = "racecar"
if is_palindrome(test_string):
print(f"'{test_string}' is a palindrome.")
else:
print(f"'{test_string}' is not a palindrome.")
```
**Explanation:**
1. **Function Definition:**
- `def is_palindrome(s):` defines a function named `is_palindrome` that
takes a single argument `s`, which represents the input string.
2. **Palindrome Check:**
- `return s == s[::-1]` : This line does the core palindrome check.
- `s[::-1]` creates a reversed copy of the string `s`.
- `s == s[::-1]` compares the original string with its reversed
version. If they are equal, the string is a palindrome, and the function re
returns `True`; otherwise, it returns `False`.
3. **Test Case:**
- `test_string = "racecar"`: A sample string "racecar" is assigned to t
the variable `test_string`.
- The `if` statement calls the `is_palindrome()` function with
`test_string` and prints an appropriate message based on the result.
**How it Works:**
A palindrome is a word, phrase, number, or other sequence of characters
that reads the same backward as forward. This code leverages Python's
string slicing capabilities to efficiently reverse the input string and
compare it with the original.
Let me know if you'd like to explore more complex palindrome checks (e.g.,
handling case-insensitivity, punctuation, or special characters)!