C Program to Check Vowel or Consonant

In English, five alphabets A, E, I, O, and U are called as Vowels. All the remaining alphabets except these five are called as consonants. In this article, we will show you, How to write a C Program to check Vowel or Consonant with an example.

C Program to Check Vowel or Consonant

This C program allows the user to enter any character and check whether the user specified character is Vowel or Consonant using If Else Statement.

// C Program to Check Vowel or Consonant
#include <stdio.h>

int main()
{
    char ch;

    printf("Please Enter an alphabet: \n");
    scanf(" %c", &ch);
    
    if(ch == 'a' || ch == 'e' || ch == 'i' || ch == 'o' || ch == 'u' ||
		ch == 'A' || ch == 'E' || ch == 'I' || ch == 'O' || ch == 'U')  {
		printf("\n %c is a VOWEL.", ch);
	}
    else {
    	printf("\n %c is a CONSONANT.", ch);
	}
    return 0;
}

OUTPUT

ANALYSIS
The following statement will ask the user to enter any character, and then we are assigning the character to previously declared variable ch

printf("Please Enter an alphabet: \n");
scanf(" %c", &ch);

Next, we used the If Else Statement to check whether the user entered character is equal to a, e, i, o, u, A, E, I, I, O. And if it is TRUE, it is a Vowel otherwise, it’s a Consonant.

Remember, you can convert all the characters to one case using strlwr or strupr and then check for lowercase or uppercase elements in the If condition

if(ch == 'a' || ch == 'e' || ch == 'i' || ch == 'o' || ch == 'u' ||
    ch == 'A' || ch == 'E' || ch == 'I' || ch == 'O' || ch == 'U')  {
	printf("\n %c is a VOWEL.", ch);
}

C Program to Check whether a Character is Vowel or Consonant – Approach 2

This C program is same as above program but we arranged the code more readable

// C Program to Check Whether a Character is Vowel or Consonant
#include <stdio.h>

int main()
{
    char ch;
    int lowercase_Vowel, uppercase_Vowel;

    printf("Please Enter an alphabet: \n");
    scanf(" %c", &ch);

    lowercase_Vowel = (ch == 'a' || ch == 'e' || ch == 'i' || ch == 'o' || ch == 'u');
    uppercase_Vowel = (ch == 'A' || ch == 'E' || ch == 'I' || ch == 'O' || ch == 'U');

    if (lowercase_Vowel || uppercase_Vowel) {
    	printf("\n %c is a VOWEL.", ch);
	}
    else {
    	printf("\n %c is a CONSONANT.", ch);
	}
    return 0;
}

OUTPUT

OUTPUT 2: Let us enter the Consonant value

C Program to Check Vowel or Consonant using Functions

This C program allows the user to enter any character, and find whether the user specified character is Vowel or Consonant using Functions.

// C Program to Check Whether an Alphabet is Vowel or Consonant
#include <stdio.h>
int check_vowel(char a);
int main()
{
    char ch;
    printf("Please Enter an alphabet: \n");
    scanf(" %c", &ch);
    
    if(check_vowel(ch))  {
		printf("\n %c is a VOWEL.", ch);
	}
    else {
    	printf("\n %c is a CONSONANT.", ch);
	}
    return 0;
}

int check_vowel(char c)
{
    if (c >= 'A' && c <= 'Z')
       c = c + 32; 
 
    if (c == 'a' || c == 'e' || c == 'i' || c == 'o' || c == 'u')
       return 1;
 
    return 0;
}

OUTPUT

OUTPUT 2: Let us enter the Consonant value

C Program to Check Vowel or Consonant using ASCII Values

This C program allows the user to enter any character and check whether the specified character is Vowel or Consonant using ASCII Values.

// C Program to Check Whether it is Vowel or Consonant
#include <stdio.h>
 
int main()
{
    char ch;
 
    printf("Please Enter an alphabet: \n");
    scanf(" %c", &ch);
 
    if(ch == 97 || ch == 101 || ch == 105 || ch == 111 || ch == 117 || 
	ch == 65 || ch == 69 || ch == 73 || ch == 79 || ch == 85)
    {
    	printf("%c is a VOWEL.\n", ch);
    }
    else if((ch >= 97 && ch <= 122) || (ch >= 65 && ch <= 90))
    {
        printf("%c is a CONSONANT.\n", ch);
    }
 
    return 0;
}

OUTPUT

OUTPUT 2: Let us enter the Consonant value

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