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**Question:**

Write a function called count_vowels that takes a string as input and returns the count of vowels (a, e, i, o, u) in the string. Use a for loop to iterate through each character in the string and count the number of vowels. Ignore case sensitivity, meaning 'A' and 'a' should be considered the same vowel.

**Example:**

Input: "Hello, World!"

Output: 3

def count_vowels(string): """ Counts the number of vowels in a given string. Args: string (str): The input string. Returns: int: The count of vowels in the string. """ # TODO: Implement the count_vowels function pass

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