This is a classic question, and there are multiple ways to solve this. For the sake of learning, let's cover all of them!

Using built-in methods

This would probably be invalid in an actual interview, but you can rely on the built-in String method to accomplish a quick reversal. In Javascript, you can simply call reverse() and in Python, you can call [::-1] You can then compare the reversed string to the original:

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function isPalindrome(str) {

  // Calling reverse function

  const reversed = str.split('').reverse().join('');

​

  // Checking if both strings are equal or not

  if (str == reversed) {

    return true;

  }

  return false;

}

​

console.log(isPalindrome('racecar'));