#include <stdio.h>

void main()
{
    char ch;
    printf("Enter character to find if it's vowel or consonant \n");
    scanf("%c", &ch);
    // to check if character entered is an alphabet
    // with help of ascii values of alphabets
    if (((int)ch >= 97 && (int)ch <= 122) || ((int)ch >= 65 && (int)ch <= 90))
    {
        // if character is actually alphabet,
        // check if its A,a,E,e,I,i,O,o,U,u
        if (ch == 'A' || ch == 'a' || ch == 'E' || ch == 'e' || ch == 'I' || ch == 'i' || ch == 'O' || ch == 'o' || ch == 'U' || ch == 'u')
        {
            printf("You entered VOWEL ");
        }
        // if alphabet is not vowel its consonent
        else
        {
            printf("You entered CONSONANT ");
        }
    }
    else
    {
        printf("INVALID character");
    }
}