Python: 5 Methods to find a character is Vowel or Consonant

In this tutorial, we will learn how to find whether a given character is a vowel or consonant in Python. We will look at five different ways to solve this problem.

Contents hide
1 Method 1: Using if-else statement
2 Method 2: Using a list
3 Method 3: Using a dictionary
4 Method 4: Using a set
5 Method 5: Using a function from the string module
6 Conclusion
6.1 Related posts:

Method 1: Using if-else statement

The most straightforward way to solve this problem is to use an if-else statement. We can check if the given character is present in the string ‘aeiouAEIOU’, which contains all the vowels (both upper and lower case). If it is present, we can print that it is a vowel. Otherwise, we can print that it is a consonant.

Python 
def is_vowel_or_consonant(ch):
    if ch in 'aeiouAEIOU':
        print(ch, 'is a vowel')
    else:
        print(ch, 'is a consonant')

# test the function
is_vowel_or_consonant('a')  # a is a vowel
is_vowel_or_consonant('b')  # b is a consonant
is_vowel_or_consonant('E')  # E is a vowel
is_vowel_or_consonant('f')  # f is a consonant

 

Method 2: Using a list

We can also use a list to store the vowels and check if the given character is present in the list.

Python 
def is_vowel_or_consonant(ch):
    vowels = ['a', 'e', 'i', 'o', 'u', 'A', 'E', 'I', 'O', 'U']
    if ch in vowels:
        print(ch, 'is a vowel')
    else:
        print(ch, 'is a consonant')

# test the function
is_vowel_or_consonant('a')  # a is a vowel
is_vowel_or_consonant('b')  # b is a consonant
is_vowel_or_consonant('E')  # E is a vowel
is_vowel_or_consonant('f')  # f is a consonant

 

Method 3: Using a dictionary

We can also use a dictionary to store the vowels and their corresponding values. Then, we can check if the given character is present in the dictionary as a key.

Python 
def is_vowel_or_consonant(ch):
    vowels = {'a': True, 'e': True, 'i': True, 'o': True, 'u': True, 
              'A': True, 'E': True, 'I': True, 'O': True, 'U': True}
    if ch in vowels:
        print(ch, 'is a vowel')
    else:
        print(ch, 'is a consonant')

# test the function
is_vowel_or_consonant('a')  # a is a vowel
is_vowel_or_consonant('b')  # b is a consonant
is_vowel_or_consonant('E')  # E is a vowel
is_vowel_or_consonant('f')  # f is

 

Method 4: Using a set

Another way to solve this problem is to use a set to store the vowels. Sets are similar to lists and dictionaries, but they do not store values for each element. They are mainly used to check for membership and to remove duplicate elements.

 
Python 
def is_vowel_or_consonant(ch):
    vowels = {'a', 'e', 'i', 'o', 'u', 'A', 'E', 'I', 'O', 'U'}
    if ch in vowels:
        print(ch, 'is a vowel')
    else:
        print(ch, 'is a consonant')

# test the function
is_vowel_or_consonant('a')  # a is a vowel
is_vowel_or_consonant('b')  # b is a consonant
is_vowel_or_consonant('E')  # E is a vowel
is_vowel_or_consonant('f')  # f is a consonant

 

Method 5: Using a function from the string module

Python provides a built-in function in the string module to check if a character is a vowel or consonant. The str.isalpha() function returns True if the given character is an alphabet, and False otherwise. The str.lower() function converts the character to lowercase, and the str.isvowel() function returns True if the character is a vowel, and False otherwise.

Python 
import string

def is_vowel_or_consonant(ch):
    if ch.isalpha():
        if ch.lower() in 'aeiou':
            print(ch, 'is a vowel')
        else:
            print(ch, 'is a consonant')
    else:
        print(ch, 'is not an alphabet')

# test the function
is_vowel_or_consonant('a')  # a is a vowel
is_vowel_or_consonant('b')  # b is a consonant
is_vowel_or_consonant('E')  # E is a vowel
is_vowel_or_consonant('f')  # f is a consonant
is_vowel_or_consonant('1')  # 1 is not an alphabet

 

Conclusion

In this tutorial, we learned how to find whether a given character is a vowel or consonant in Python. We looked at five different methods to solve this problem using if-else statements, lists, dictionaries, sets, and functions from the string module. You can choose the method that best suits your needs and use it in your Python programs.

 
 

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