Kth word X69738

Statement

Write a function @kth_word(s, k)@ that given a string $s$ and an integer $k\ge 1$ returns the $k{\it th}$ word in string $s$ . If $s$ has less than $k$ words it returns the empty string. We assume all characters of $s$ are letters and spaces. Warning: do not use the split string method.

Sample session

>>> kth_word('Alea iacta est', 3)
'est'
>>> kth_word('Alea iacta est', 1)
'Alea'
>>> kth_word('KingKong', 2)
''

Information

Author: ProAl
Language: English
Official solutions: Python
User solutions: Python