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1. Introduction
Vowels are an essential part of English phonetics, and counting them in a given string is a common task in text analysis. This simple Python program demonstrates how to count the number of vowels in a string.
In the English language, the letters A, E, I, O, U (and sometimes Y) are considered vowels. The task here is to iterate over the string and count occurrences of these characters.
2. Program Steps
1. Define a string that contains a sequence of characters.
2. Create a list or set of vowels for reference.
3. Initialize a count variable to zero.
4. Loop through the string, checking each character to see if it is a vowel.
5. Increment the count for each vowel encountered.
6. Print the total count of vowels.
3. Code Program
# Define the string
input_string = "Python Programming is fun."
# Define the set of vowels
vowels = set('aeiouAEIOU')
# Initialize the vowel count
vowel_count = 0
# Loop through the string and count the vowels
for char in input_string:
if char in vowels:
vowel_count += 1
# Print the vowel count
print(f"The number of vowels in the string is: {vowel_count}")
Output:
The number of vowels in the string is: 6
Explanation:
1. input_string is the string in which we want to count vowels.
2. vowels is a set containing all uppercase and lowercase vowels.
3. vowel_count is initialized to 0 and is used to track the number of vowels found.
4. The for loop iterates over each character char in input_string.
5. The if condition checks if the current char is present in the vowels set.
6. For every vowel found, vowel_count is incremented by 1.
7. After the loop completes, vowel_count reflects the total number of vowels in input_string.
8. The print statement outputs this count, showing that there are 6 vowels in the string "Python Programming is fun.".
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