change while to for loop

Author: miguelHx

Python/chapter02/2.2 - Return Kth to Last/miguel_2.2_soln.py

@@ -99,10 +99,8 @@ def kth_to_last(ll: LinkedList, k: int) -> Node:
         raise IndexError('list index out of range')
     # go size - k steps
     n = ll.head
-    i = 1
-    while n is not None and i <= ll.size - k:
+    for i in range(1, ll.size - k + 1):
         n = n.next
-        i += 1
     return n