Determining vowel or consonant

Question

#include <stdio.h>
int main(void)
{
char ch;
printf("Please enter a letter:");
scanf("%c", &ch);
int ascii = ch;
if(ascii == 65 || ascii == 69 || ascii == 73 || ascii == 79 || ascii == 85)
printf("Vowel");
else if(ascii == 97 || ascii == 101 || ascii == 105 || ascii == 111 || ascii
== 117)
printf("Vowel");
else if((ascii >= 65 && ascii <= 90) || (ascii >= 97 && ascii <= 122))
printf("Consonant");
else
printf("Invalid input");
return 0;
}