Vowel or Not

#include

main()
{
char ch;
printf("Enter a 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')

printf("%c is a vowel.\n", ch);

else

printf("%c is not a vowel.\n", ch);
return 0;
}

Check vowel using switch:

#include
main()
{
char ch;
printf("Enter a character\n");
scanf("%c", &ch);

switch(ch)
{
case 'a':
case 'A':
case 'e':
case 'E':
case 'i':
case 'I':
case 'o':
case 'O':
case 'u':
case 'U':

printf("%c is a vowel.\n", ch);
break;

default: printf("%c is not a vowel.\n", ch);

}
return 0;
}

Function to check vowel

int check_vowel(char a)
{
 if (a >= 'A' && a <= 'Z')
a = a + 'a' - 'A'; /* Converting to lower case or use a = a + 32 */

if (a == 'a' || a == 'e' || a == 'i' || a == 'o' || a == 'u')

return 1;
return 0;
}

program to check whether input alphabet is a vowel or not