Statement

Write a function that takes a string, s, as an input and determines whether or not it is a palindrome.

Note: A palindrome is a word, phrase, or sequence of characters that reads the same backward as forward.

Constraints:

  • 11 \leq s.length 2×105\leq 2 \times 10^5
  • The string s will contain English uppercase and lowercase letters, digits, and spaces.

Examples

Understand the problem

Let’s take a moment to make sure you've correctly understood the problem. The quiz below helps you check if you're solving the correct problem:

Valid Palindrome

1

“abab” is a palindrome.

A)

True

B)

False

Question 1 of 40 attempted

Figure it out!

We have a game for you to play. Rearrange the logical building blocks to develop a clearer understanding on how to solve this problem.

Drag and drop the cards to rearrange them in the correct sequence.

Try it yourself

Implement your solution in main.js in the following coding playground. We have provided a useful code template in the other file that you can use to solve this problem.

JavaScript
usercode > main.js
function isPalindrome(s) {
// Replace this placeholder return statement with your code
return false;
}
export { isPalindrome };
Valid Palindrome