[Algorithm] 17 week(5.09 ~ 5.15) 1/3

206. Reverse Linked List

var reverseList = function(head) {
  let prev = null;
            
  while(head){  
    let nextNode = head.next;    
    head.next = prev;
    prev = head;
    head = nextNode;
  }  
  return prev; 
};