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Python Count the Number of Each Vowel

Python Count the Number of Each Vowel

In this tutorial, we will learn how to count the number of each vowel in a string in Python. We will cover the basic concept of string manipulation and implement a function to perform the counting.

What is String Manipulation

String manipulation involves altering, parsing, and analyzing strings in various ways. Counting the number of each vowel in a string is a common task in text processing.

Syntax

The syntax to count the number of each vowel in a string in Python is:

def count_vowels(s):
    vowels = 'aeiou'
    s = s.lower()
    count = {vowel: s.count(vowel) for vowel in vowels}
    return count

Counting the number of each vowel in a string

We can create a function to count the number of each vowel in a given string by iterating through the vowels and counting their occurrences in the string.

For example,

  1. Define a function named count_vowels that takes one parameter s.
  2. Convert the string to lowercase to ensure case-insensitive counting.
  3. Initialize a dictionary to store the count of each vowel.
  4. Use a dictionary comprehension to iterate through each vowel and count its occurrences in the string.
  5. Return the dictionary with the counts of each vowel.
  6. Call the function with a sample string and print the result.

Python Program

def count_vowels(s):
    vowels = 'aeiou'
    s = s.lower()
    count = {vowel: s.count(vowel) for vowel in vowels}
    return count

# Sample string
sample_string = "Hello, world! Welcome to Python programming."

# Count the number of each vowel in the sample string
result = count_vowels(sample_string)

# Print the result
print('Vowel counts:', result)

Output

Vowel counts: {'a': 1, 'e': 3, 'i': 1, 'o': 6, 'u': 0}