What is the program to find the entered character is vowel or not?

Answer 1

check if it is in the string below (you can use whichever method you like, but I think dichotomy is the most suitable one)
"aeiouyAEIOUY"

Answer 2

Store all vowels in an array.
Using a for loop compare entered input with each element in array.
If same display that its a vowel