Preliminary

  • Due Date: Friday, January 26 by 12:45
  • This is an individual assignment.

Counting Vowels - 100 points

In this assignment, you will use your knowledge of Python strings and recursion to write functions that count the number of vowels in a string.

Assignment

  • Download vowels.py
  • Replace the body of the count_vowels function such that it returns the number of vowels in the supplied sentence using the built-in count() method. The function must assume that the supplied string contains uppercase and lowercase letters.
  • Replace the body of the count_vowels_iterative function such that it returns the number of vowels in the supplied sentence using a for loop. The function must assume that the supplied string contains uppercase and lowercase letters.
  • Replace the body of the count_vowels_recursion function such that it returns the number of vowels in the supplied sentence using recursion. The function must assume that the supplied string contains uppercase and lowercase letters.

Assumption

  • Consider the following letters only to be vowels: a, e, i, o and u (and not A, E, I, O, U, Y, or y).

Requirements and Grading

  • 30 points - The count_vowels function is correctly implemented.
  • 30 points - The count_vowels_iterative function is correctly implemented.
  • 40 points - The count_vowels_recursive function is correctly implemented.

Submission

Place the solution in a file named vowels_[firstname].py and submit it in the Portal no later than 12:45 PM on Friday, January 26.