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  1. // your code goes here
  2.  
  3. function isPalindrome(str) {
  4. 	// // return true if str is a palindrome else false
  5. 	// let tmp = "";
  6. 	// for(let i=str.length-1;i>=0;i--){
  7. 	// 	tmp += str[i];
  8. 	// }
  9.  
  10. 	// return tmp == str;
  11.  
  12. 	let left = 0, right = str.length - 1;
  13.  
  14. 	while(left < right){
  15. 		if(str[left]!=str[right]) {
  16. 			return false;
  17. 		}
  18. 		left++;
  19. 		right--;
  20. 	}
  21. 	return true;
  22. }
  23.  
  24. console.log(isPalindrome("racecar"))
Success #stdin #stdout 0.03s 18680KB
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true
https://ideone.com/ylU9Fp
language:
JavaScript (SMonkey 60.2.3)
created:
2 days ago
visibility:
public

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