Description

To count vowels, consonants, digits and whitespaces, check the characters in
string is vowel, consonant, digit and whitespaces and increase corresponding count.

C/C++

/* C Program to count Vowels, Consonants, Digits and Whitespaces */
//Save it as CountVowelsConsonantsDigitsWhitespaces.c

#include<stdio.h>
#include<string.h>
int main(){

    char str[100];
    int i;

    printf("Enter a string : ");
    gets(str);

    int vowel=0, consonant=0, digit=0, whitespace=0;

    for(i=0;i<strlen(str);i++) {
        if((str[i]>='a' && str[i]<='z') || (str[i]>='A' && str[i]<='Z')) {
            if(str[i]=='a' || str[i]=='A' || str[i]=='e' || str[i]=='E' || str[i]=='i' ||
               str[i]=='I' || str[i]=='o' || str[i]=='O' || str[i]=='u' || str[i]=='U'){
                      vowel++;
            }else{
                consonant++;
            }
        }else if(str[i]>='0' && str[i]<='9'){
            digit++;
        }else if(str[i] == ' ') {
            whitespace++;
        }
    }

    printf("Number of vowel = %d", vowel);
    printf("\nNumber of consonant = %d", consonant);
    printf("\nNumber of digit = %d", digit);
    printf("\nNumber of whitespace = %d", whitespace);

    return 0;
}

Input:
Enter a string : pwe arf386q tu

Output:
Number of vowel = 3
Number of consonant = 6
Number of digit = 3
Number of whitespace = 2

Java

/* Java Program to count Vowels, Consonants, Digits and Whitespaces */
//Save it as CountVowelsConsonantsDigitsWhitespaces.java

import java.io.*;
import java.util.Scanner;

public class CountVowelsConsonantsDigitsWhitespaces {

    public static void main(String[] args) {

        Scanner scanner = new Scanner(System.in);
        
        System.out.println("Enter a string : ");
        String  str = scanner.nextLine();
        
        char newStr[] = str.toCharArray();
        
        int vowel=0, consonant=0, digit=0, whitespace=0;
        
        for(int i=0;i<newStr.length;i++) {
            if((newStr[i]>='a' && newStr[i]<='z') || (newStr[i]>='A' && newStr[i]<='Z')) {
                if(newStr[i]=='a' || newStr[i]=='A' || newStr[i]=='e' || newStr[i]=='E' || newStr[i]=='i' ||
                   newStr[i]=='I' || newStr[i]=='o' || newStr[i]=='O' || newStr[i]=='u' || newStr[i]=='U'){
                          vowel++;
                }else{
                	consonant++;
                }
            }else if(newStr[i]>='0' && newStr[i]<='9'){
                digit++;
            }else if(newStr[i] == ' ') {
                whitespace++;
            }
        }
        
        System.out.println("Number of vowel = "+ vowel);
        System.out.println("Number of consonant = "+ consonant);
        System.out.println("Number of digit = "+ digit);
        System.out.println("Number of whitespace = "+ whitespace);
    }
}

Input:
Enter a string : 
pwe arf386q tu

Output:
Number of vowel = 3
Number of consonant = 6
Number of digit = 3
Number of whitespace = 2

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