Algorithm

  1. Input:

    • Accept a string as input.

  2. Initialize Counters:

    • Initialize variables (counters) for each vowel (a, e, i, o, u) to zero.

  3. Convert to Lowercase:

    • Convert the input string to lowercase to handle both uppercase and lowercase vowels uniformly.

  4. Iterate Through the String:

    • Use a loop to iterate through each character in the string.
    • Check for Vowels:
      • For each character, check if it is a vowel (a, e, i, o, u).

  5. Increment Counters:

    • If the character is a vowel, increment the corresponding counter.

  6. Display or Store Results:

    • After processing the entire string, display or store the counts for each vowel.

 

Code Examples

#1 Code Example- Using Dictionary

Code - Python Programming

# Program to count the number of each vowels

# string of vowels
vowels = 'aeiou'

ip_str = 'Hello, have you tried our tutorial section yet?'

# make it suitable for caseless comparisions
ip_str = ip_str.casefold()

# make a dictionary with each vowel a key and value 0
count = {}.fromkeys(vowels,0)

# count the vowels
for char in ip_str:
   if char in count:
       count[char] += 1

print(count)
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Output

x
–
+
cmd
{'o': 5, 'i': 3, 'a': 2, 'e': 5, 'u': 3}

#2 Code Example- Using a list and a dictionary comprehension

Code - Python Programming

# Using dictionary and list comprehension

ip_str = 'Hello, have you tried our tutorial section yet?'

# make it suitable for caseless comparisions
ip_str = ip_str.casefold()

# count the vowels
count = {x:sum([1 for char in ip_str if char == x]) for x in 'aeiou'}

print(count)
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Demonstration

Python Programing Example to Count the Number of Each Vowel-DevsEnv