Remove the vowels from a string in Python

Understanding Vowel Removal

Vowel removal involves deleting all vowels (a, e, i, o, u) from a given string.

We will explore three different methods to remove vowels from a string using Python.

Method 1: Using a Loop

This method iterates through the string and constructs a new string without vowels.

def remove_vowels(s):
    result = "".join([c for c in s if c.lower() not in "aeiou"])
    return result

# Example usage
s = "Hello World"
print("String without vowels:", remove_vowels(s))
            

Method 2: Using Recursion

This method removes vowels recursively.

def remove_vowels_recursive(s):
    if not s:
        return ""
    first = s[0]
    rest = remove_vowels_recursive(s[1:])
    return first + rest if first.lower() not in "aeiou" else rest

# Example usage
s = "Programming"
print("String without vowels:", remove_vowels_recursive(s))
            

Method 3: Using Regular Expressions

This method uses regex to replace all vowels in the string.

import re

def remove_vowels_regex(s):
    return re.sub(r"[aeiouAEIOU]", "", s)

# Example usage
s = "Count Vowels"
print("String without vowels:", remove_vowels_regex(s))