Remove Vowels in C, C++, Java & Python – Code with Explanation & Examples in Short and Simple

  

C Program

#include <stdio.h>
#include <string.h>
#include <ctype.h>

int main() {
    char str[100], result[100];
    int i, j = 0;
    printf("Enter a string: ");
    gets(str);

    for(i = 0; str[i] != '\0'; i++) {
        char c = tolower(str[i]);
        if(c!='a' && c!='e' && c!='i' && c!='o' && c!='u')
            result[j++] = str[i];
    }
    result[j] = '\0';

    printf("String after removing vowels: %s", result);
    return 0;
}

C Output

Input: hello world
Output: hll wrld

C++ Program

#include <iostream>
#include <string>
using namespace std;

int main() {
    string str, result="";
    cout << "Enter a string: ";
    getline(cin, str);

    for(char c : str) {
        char lower = tolower(c);
        if(lower!='a' && lower!='e' && lower!='i' && lower!='o' && lower!='u')
            result += c;
    }
    cout << "String after removing vowels: " << result;
    return 0;
}

C++ Output

Input: programming
Output: prgrmmng

JAVA Program

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        System.out.print("Enter a string: ");
        String str = sc.nextLine();
        String result = "";

        for(char c : str.toCharArray()) {
            char lower = Character.toLowerCase(c);
            if(lower!='a' && lower!='e' && lower!='i' && lower!='o' && lower!='u')
                result += c;
        }
        System.out.println("String after removing vowels: " + result);
    }
}

JAVA Output

Input: education
Output: dctn

Python Program

s = input("Enter a string: ")
result = "".join([c for c in s if c.lower() not in 'aeiou'])
print("String after removing vowels:", result)

Python Output

Input: computer

Output: cmptr

In-Depth Explanation

Example

If you enter a word such as "hello world", then it goes through each character and deletes vowels a, e, i, o, u. It becomes "hll wrld" after going through the process. This is how filtering occurs within strings.

Real-Life Analogy

Consider vowels within a word as "background sounds" within a noisy room. Take away the background noise and all you have are the clearer, sharper sounds (the consonants). Likewise, when we remove vowels, the string retains its fundamental composition but is shorter and clearer.

Why It Matters

This kind of problem enhances the comprehension of string manipulation and conditional filtering in programming. Deletion of vowels is a special case of a larger problem—character filtering, which is commonly used in text processing applications such as spam filters, natural language processing, data cleaning, and cryptography.

Learning Insights

This exercise shows you how to iterate over every character of a string and implement conditions. At the beginner level of programming, it sets good grounds for array or list manipulation. In advanced scenarios, the same principle applies to regular expressions, where rather than checking yourself, you use patterns to screen characters.

Use in Interviews

Interviewers tend to ask somewhat similar string problems to see how good you are with loops, conditions, and string concatenation. "remove spaces", "remove digits", "count vowels and consonants", or "remove special characters" are all based on this idea. By mastering this, you're ready for a few variations of string-based coding activities. 

Real-World Applications

Dropping vowels might sound pedantic, but in the real world, this reasoning comes under the category of text compression. Take the case of some early SMS text abbreviations that omitted vowels to conserve space ("txt msg" for "text message"). Likewise, password or username generators occasionally remove vowels to shorten the identifiers.

Learning how to remove vowels from a string using C, C++, Java, and Python helps beginners strengthen their string manipulation skills while preparing for coding interviews and academic exams. By practicing this problem, students gain confidence in handling conditions, loops, and text filtering operations. Whether you’re preparing for an MSBTE exam, improving your coding basics, or practicing string problems for interviews, understanding vowel removal provides a strong foundation in programming logic and problem-solving.