C program to check character is vowel or not

 C program to check character is vowel or not

• Five letter 'A' 'E' 'I' 'O' 'U' are called vowels. All other alphabets excepts these vowels are called consonants.

#include 
int main()
{
    char c; // character value
    int lowercase, uppercase; // integer value
    printf("Enter an alphabet: "); // user enter character
    scanf("%c", &c); // storing value

    // evaluates to 1 if variable c is lowercase
    lowercase = (c == 'a' || c == 'e' || c == 'i' || c == 'o' || c == 'u');

    // evaluates to 1 if variable c is uppercase
    uppercase = (c == 'A' || c == 'E' || c == 'I' || c == 'O' || c == 'U');

    // evaluates to 1 if c is either lowercase or uppercase
    if (lowercase || uppercase)
        printf("%c is a vowel.", c);
    else
        printf("%c is a consonant.", c);
    return 0;
}

Output

Enter an alphabet : G
G is consonant.

• The character entered by the user is stored in c.
• The lowercase variable evaluated to 1 (true) if c is a lowercase vowel and 0 (false)  for any other character.
• Similarly, the uppercase variable evaluated to 1 (true) if c  is an uppercase vowel and 0 (false) for any other character. 
• if either lowercase or uppercase variable is 1( ture), the entered character is vowel. 
• However, if both lowercase and uppercase variables are 0, the entered character is consonant.  

Happy Coding