Check if a word is a Palindrome

isPalindrome.js

function isPalindrome(word)
{
  word = word.toLowerCase();
  const length = word.length;
  let check = false;
  
  if (word % 2 === 0) {
    for (let i = 0; i < length; i++) {
      if (word[i] === word[length - i]) {
        check = true;
      }
    }
  } else {
    const median = Math.ceil(length / 2) - 1;

    const wordOdd = word.substring(0, median - 1) + word.substring(median);
    for (let i = 0; i < wordOdd.length; i++) {
      if (wordOdd[i] === wordOdd[wordOdd.length - i]) {
        check = true;
      }
    }
  }

  return check;
}

console.log(isPalindrome('bob'))