Count vowels in a string – Python Program

Hello everyone, welcome back to programminginpython.com! Here in this tutorial am going to tell how you can count vowels in a string when an input string is received you will be able to count the number of vowels present in that string.

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Program on Github

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Task

Python program to count the number of each vowel in a given string.

Approach

• Read an input string using input() or raw_input().
• Declare vowels as a string `vowels = ‘aeiou’`
• Make the input string case insensitive using `casefold()` method
• Create a dictionary with each vowel a key and value 0
• Loop the string and check for vowels and if found increment the value in the dictionary
• Print the result(dictionary)

Program

__author__ = 'Avinash'

# Python3 program to count vowels in a string

# string of vowels
vowels = 'aeiou'
input_str = input("Enter a string: ")
# make input string case insensitive
input_str = input_str.casefold()
# make a dictionary with each vowel a key and value 0
vowels_count = {}.fromkeys(vowels, 0)
# count the number of each vowels
for letter in input_str:
    if letter in vowels_count:
        vowels_count[letter] += 1
print(vowels_count)

Output

Count Vowels in a String – Code Visualization

Feel free to check other Python programs like sorting and searching algorithms or pattern programming and many more programs here.

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