C Program - Check whether an Alphabet is Vowel or Consonant

This C program checks whether a given character is a vowel or a consonant.

#include <stdio.h>
#include <stdbool.h>

int main()
{
    char ch;
    bool isVowel = false;

    printf("Enter Character: \n");
    scanf("%c",&ch);

    if(ch =='a'||ch=='A'||ch=='e'||ch=='E'||ch=='i'||ch=='I'
            ||ch=='o'||ch=='O'||ch=='u'||ch=='U')
    {
        isVowel = true;
    }

    if (isVowel == true)
    {
        printf("%c is a Vowel", ch);
    }
    else
    {
        printf("%c is a Consonant", ch);
    }

    return 0;
}

Result: 

Enter Character:
b
b is a Consonant
Process returned 0 (0x0)   execution time : 3.969 s
Press any key to continue.

One more time:

Enter Character:
e
e is a Vowel
Process returned 0 (0x0)   execution time : 1.785 s
Press any key to continue.

Here's a line-by-line explanation: 

#include <stdio.h>
#include <stdbool.h>

These lines include the standard input/output library header file and the header file for the bool data type. 

int main()
{
    char ch;
    bool isVowel = false;

This declares the main function and two variables ch and isVowel. ch is a character variable to store the input character and isVowel is a boolean variable to store whether the input character is a vowel or not. 

    printf("Enter Character: \n");
    scanf("%c",&ch);

These lines prompt the user to enter a character and read its value from the standard input using the scanf() function. 

    if(ch =='a'||ch=='A'||ch=='e'||ch=='E'||ch=='i'||ch=='I'
            ||ch=='o'||ch=='O'||ch=='u'||ch=='U')
    {
        isVowel = true;
    }

This if statement checks if the input character is a vowel. If the character is a vowel, the boolean variable isVowel is set to true. 

    if (isVowel == true)
    {
        printf("%c is a Vowel", ch);
    }
    else
    {
        printf("%c is a Consonant", ch);
    }

This if-else statement checks the value of the isVowel variable. If it is true, the program prints that the input character is a vowel; otherwise, it prints that the input character is a consonant. 

    return 0;
}

This line indicates the end of the main() function and returns 0, indicating that the program has executed successfully.