// A program that will find a letter is vowel or consonant
var letter = prompt("Enter a letter : ");

// convert any uppercase input into lower cause we set only lowercase letter in condition
letter = letter.toLowerCase();

// Now check the condition
if (
  letter == "a" ||
  letter == "e" ||
  letter == "i" ||
  letter == "o" ||
  letter == "u"
) {
  console.log("Vowel");
} else {
  console.log("Consonant");
}