Program to remove vowels from a String

Given a string, remove the vowels from the string and print the string without vowels. 

Examples:

Input : welcome to geeksforgeeks
Output : wlcm t gksfrgks

Input : what is your name ?
Output : wht s yr nm ?

A loop is designed that goes through a list composed of the characters of that string, removes the vowels and then joins them.  

C++14

// C++ program to remove vowels from a String
#include <bits/stdc++.h>
using namespace std;

string remVowel(string str)
{
    vector<char> vowels = {'a', 'e', 'i', 'o', 'u',
                           'A', 'E', 'I', 'O', 'U'};

    for (int i = 0; i < str.length(); i++)
    {
        if (find(vowels.begin(), vowels.end(),
                      str[i]) != vowels.end())
        {
            str = str.replace(i, 1, "");
            i -= 1;
        }
    }
    return str;
}

// Driver Code
int main()
{
    string str = "GeeeksforGeeks - A Computer"
                 " Science Portal for Geeks";
    cout << remVowel(str) << endl;

    return 0;
}

// This code is contributed by
// sanjeev2552
// and corrected by alreadytaken

Java

import java.util.Scanner;

public class Practice {

    public static void main(String[] args)
    {
        Scanner sc = new Scanner(System.in);
        String s = sc.nextLine();
        for (int i = 0; i < s.length(); i++) {
            if (s.charAt(i) == 'a' || s.charAt(i) == 'e'
                || s.charAt(i) == 'i' || s.charAt(i) == 'o'
                || s.charAt(i) == 'u' || s.charAt(i) == 'A'
                || s.charAt(i) == 'E' || s.charAt(i) == 'I'
                || s.charAt(i) == 'O'
                || s.charAt(i) == 'U') {
                continue;
            }
            else {
                System.out.print(s.charAt(i));
            }
        }
    }
}

Python3

# Python program to remove vowels from a string
# Function to remove vowels
def rem_vowel(string):
    vowels = ['a','e','i','o','u']
    result = [letter for letter in string if letter.lower() not in vowels]
    result = ''.join(result)
    print(result)

# Driver program
string = "GeeksforGeeks - A Computer Science Portal for Geeks"
rem_vowel(string)
string = "Loving Python LOL"
rem_vowel(string)

C#

// C# program to remove vowels from a String
using System;
using System.Text;
using System.Linq;
using System.Collections.Generic;
public class Test
{
    static String remVowel(String str)
    {
         char []vowels = {'a', 'e', 'i', 'o', 'u','A','E','I','O','U'};

         List<char> al = vowels.OfType<char>().ToList();;

         StringBuilder sb = new StringBuilder(str);

         for (int i = 0; i < sb.Length; i++) {

             if(al.Contains(sb[i])){
                sb.Replace(sb[i].ToString(), "") ;
                i--;
             }
        }


        return sb.ToString();
    }
    // Driver method to test the above function
    public static void Main()
    {
        String str = "GeeeksforGeeks - A Computer Science Portal for Geeks";

        Console.Write(remVowel(str));
    }
}
//This code is contributed by Rajput-Ji

Javascript

<script>

// Javascript program to remove
// vowels from a String
function remVowel(str)
{
    let al = [ 'a', 'e', 'i', 'o', 'u',
               'A', 'E', 'I', 'O', 'U' ];
    let result = "";

    for(let i = 0; i < str.length; i++)
    {

        if (!al.includes(str[i]))
        {
            result += str[i];
        }
    }
    return result;
}

// Driver code
let str = "GeeeksforGeeks - A Computer Science " +
          "Portal for Geeks";
document.write(remVowel(str));

// This code is contributed by rag2127

</script>

Output

GksfrGks -  Cmptr Scnc Prtl fr Gks

Time Complexity: O(n), where n is the length of the string

Space Complexity: O(1)

We can improve the above solution by using Regular Expressions. 

C++

// C++ program to remove vowels from a String
#include <bits/stdc++.h>
using namespace std;

string remVowel(string str)
{
    regex r("[aeiouAEIOU]");

    return regex_replace(str, r, "");
}

// Driver Code
int main()
{
    string str = "GeeeksforGeeks - A Computer Science Portal for Geeks";
    cout << (remVowel(str));
    return 0;
}

// This code is contributed by Arnab Kundu

Java

// Java program to remove vowels from a String
import java.util.Arrays;
import java.util.List;

class GFG
{
    static String remVowel(String str)
    {
         return str.replaceAll("[aeiouAEIOU]", "");
    }

    // Driver Code
    public static void main(String[] args)
    {
        String str = "GeeeksforGeeks - A Computer Science Portal for Geeks";
        System.out.println(remVowel(str));
    }
}

Python3

# Python program to remove vowels from a string
# Function to remove vowels

# import the module for regular expression (re)
import re
def rem_vowel(string):
    return (re.sub("[aeiouAEIOU]","",string))

# Driver program
string = "GeeksforGeeks - A Computer Science Portal for Geeks"
print(rem_vowel(string))

C#

// C# program to remove vowels from a String
using System;
using System.Text.RegularExpressions;

class GFG
{
    static String remVowel(String str)
    {
        str = Regex.Replace(str, "[aeiouAEIOU]", "");
        return str;
    }

    // Driver code
    public static void Main()
    {
        String str = "GeeeksforGeeks - A Computer Science Portal for Geeks";
        Console.WriteLine(remVowel(str));
    }
}

//This code is contributed by 29AjayKumar

Output

GksfrGks -  Cmptr Scnc Prtl fr Gks

Time Complexity: O(n), where n is the length of the string

Space Complexity: O(1)

This article is contributed by Pramod Kumar. If you like GeeksforGeeks and would like to contribute, you can also write an article using write.geeksforgeeks.org or mail your article to review-team@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.
Please write comments if you find anything incorrect, or you want to share more information about the topic discussed above.