Determine whether the string is a palindrome-py&js

Python

def isPalindrome(s):
  s1 = s[::-1]
  if s == s1:
    return True
  else:
    return False

print(isPalindrome('asdfdsa'))

js

function isPalindrome(s){
    
    
  var left = 0;
  var right = s.length-1;

  while(left<right){
    
    
    if(s[left]!=s[right]){
    
    
      return false;
    }
    left++;
    right--;
  }
  return true;
}

var str = "asdfdsa";
console.log(isPalindrome(str));