Hints

Start the code by defining a variable and setting it to 0:

# Step 1: Define a string
text = "Hello, how many vowels are in this sentence?"

# Step 2: Define a variable to count vowels
vowel_count = 0

Then, use a for-loop to iterate over the characters of the text string. In each iteration, check if the character is in "aeiou". If it is, increase the value of vowel_count by one using vowel_count += 1.

Then, outside the for-loop, print out a message and the vowel_count value.